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features

HCM People: Sol GilbertCo-founder: Underground Gym

It’s our goal to launch two more self-funded clubs in the next three years. After that we’re open to anything: mergers or a private equity acquisition

Published in Health Club Management 2019 issue 4
Sol Gilbert
Sol Gilbert

What is your backstory?
I’m an ex-professional MMA fighter and have been in the industry since I was a teenager, first with a gym in Brighton, then Courtney’s in London and Dragons back in Brighton. After that, I went on to launch my own martial arts school.

In 2014, I teamed up with my business partner, Alan McGuinness and we expanded my gym, so members could do their strength and conditioning work with us. At the same time we rebranded to Underground Gym, so we would be perceived as less of a fight school – which was intimidating to some people – and attract a more diverse crowd.

What’s the Underground Gym brand all about?
We have three equal parts. Combat, comprising MMA, boxing, Brazilian Ju Jitsu and Muay Thai. Strength training with free weights and plate loaded equipment and power and Olympic lifting. Finally, we offer conditioning with disciplines like Parkour and calisthenics.

The mix of these three aspects means the gym floor is not as ‘alpha’ as bodybuilding gyms and our members train across a number of disciplines. Our USP is the community we create at each club, which is largely down to our staff, who are all former professional athletes – their personalities create the atmosphere and DNA of the brand.

Do all three sites offer the same?
Each site has been slightly bigger and more costly! Brighton, the original flagship site, offers the core facilities. Newhaven was the second site and is slightly larger, with a sauna and a group exercise studio. Tunbridge Wells is the largest site and has a Fit 3D body scanner, MMA Octagon, a Parkour area and Eat Naked restaurant.

What’s the membership model?
Gym membership is £39 a month, with a £20 joining fee which gets waived for certain groups, such as single parents or service personnel. Gym and fitness classes are £49 a month and gym and the more specific classes, such as Olympic lifting or Parkour, are £59 a month.

There’s also a pay-as-you-go option which costs £9.99. We’ve just developed a small group training package to help people to get better results without the expense of PT. This starts at £12.

Who are your members?
A large proportion are millennials who come before and after work. But we do have more 40-50-year-olds coming mid-morning and there’s about a 60/40 split between males and females.

What have been the main challenges with getting the brand up and running?
We’ve self-funded, so sometimes that’s been stressful. Finding the right sites and the right staff is a challenge.

As we now have multiple locations, the main goal has been to ensure we offer the same experience across all three and that they run efficiently, offering the same quality experience – even if Alan and I are only in the club once a week.

To do this, we’ve created a more formal staff structure, with managers and supervisors, to make sure everyone is singing from the same hymn sheet.

What do you look for in a site?
We look for industrial units in residential areas, with ample parking and supportive councils. Our aim is to own the south coast of the UK, so Tunbridge Wells was further north than we’d originally planned, but it was such a good location that we had to go for it.

Retailers like John Lewis and Marks & Spencer and showrooms for Bentley and BMW are within a kilometre of the club in Tunbridge Wells – it’s such an affluent area, we thought if we can’t make a gym work here, we might as well give up!

It’s an old gymnastics facility, so loads of the infrastructure was already in place, including a foam pit, which has allowed us to create a Parkour, street-running park.

We opened on 23rd November after a 30-day turnaround, adding a restaurant, widening the reception area and bringing in new kit from Core Health and Fitness, Carbon Claw and Xenios.

What are your future plans?
It’s our goal to launch two more self-funded clubs within the next three years and we’re looking for sites in Worthing and Eastbourne. After that, we’re open to anything: mergers with other chains or a private equity acquisition.

What are your predictions for the health and fitness industry?
More focus on boutiques and small group training. I also think people will get fed up of data and technology and want workouts to be more simple. There will be more cross training, but less club hopping – people will get bored of going to different places because they won’t build a community. So, I think we’ll see more ‘clubs within a club’, offering an interesting mix of facilities.

Sign up here to get HCM's weekly ezine and every issue of HCM magazine free on digital.
Alan McGuinness
Alan McGuinness
Gilbert and McGuinness look for industrial units in residential areas
Gilbert and McGuinness look for industrial units in residential areas
The Underground Gym offers a combination of combat, strength and Parkour/calisthenics
The Underground Gym offers a combination of combat, strength and Parkour/calisthenics
https://www.leisureopportunities.co.uk/images/imagesX/156873_625136.jpg
Underground Gym's co-founder, Sol Gilbert, talks about breaking the rules with a new gym model
Sol Gilbert, co-founder: Underground Gym ,Sol Gilbert, Underground Gym, combat, strength, Parkour
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features

HCM People: Sol GilbertCo-founder: Underground Gym

It’s our goal to launch two more self-funded clubs in the next three years. After that we’re open to anything: mergers or a private equity acquisition

Published in Health Club Management 2019 issue 4
Sol Gilbert
Sol Gilbert

What is your backstory?
I’m an ex-professional MMA fighter and have been in the industry since I was a teenager, first with a gym in Brighton, then Courtney’s in London and Dragons back in Brighton. After that, I went on to launch my own martial arts school.

In 2014, I teamed up with my business partner, Alan McGuinness and we expanded my gym, so members could do their strength and conditioning work with us. At the same time we rebranded to Underground Gym, so we would be perceived as less of a fight school – which was intimidating to some people – and attract a more diverse crowd.

What’s the Underground Gym brand all about?
We have three equal parts. Combat, comprising MMA, boxing, Brazilian Ju Jitsu and Muay Thai. Strength training with free weights and plate loaded equipment and power and Olympic lifting. Finally, we offer conditioning with disciplines like Parkour and calisthenics.

The mix of these three aspects means the gym floor is not as ‘alpha’ as bodybuilding gyms and our members train across a number of disciplines. Our USP is the community we create at each club, which is largely down to our staff, who are all former professional athletes – their personalities create the atmosphere and DNA of the brand.

Do all three sites offer the same?
Each site has been slightly bigger and more costly! Brighton, the original flagship site, offers the core facilities. Newhaven was the second site and is slightly larger, with a sauna and a group exercise studio. Tunbridge Wells is the largest site and has a Fit 3D body scanner, MMA Octagon, a Parkour area and Eat Naked restaurant.

What’s the membership model?
Gym membership is £39 a month, with a £20 joining fee which gets waived for certain groups, such as single parents or service personnel. Gym and fitness classes are £49 a month and gym and the more specific classes, such as Olympic lifting or Parkour, are £59 a month.

There’s also a pay-as-you-go option which costs £9.99. We’ve just developed a small group training package to help people to get better results without the expense of PT. This starts at £12.

Who are your members?
A large proportion are millennials who come before and after work. But we do have more 40-50-year-olds coming mid-morning and there’s about a 60/40 split between males and females.

What have been the main challenges with getting the brand up and running?
We’ve self-funded, so sometimes that’s been stressful. Finding the right sites and the right staff is a challenge.

As we now have multiple locations, the main goal has been to ensure we offer the same experience across all three and that they run efficiently, offering the same quality experience – even if Alan and I are only in the club once a week.

To do this, we’ve created a more formal staff structure, with managers and supervisors, to make sure everyone is singing from the same hymn sheet.

What do you look for in a site?
We look for industrial units in residential areas, with ample parking and supportive councils. Our aim is to own the south coast of the UK, so Tunbridge Wells was further north than we’d originally planned, but it was such a good location that we had to go for it.

Retailers like John Lewis and Marks & Spencer and showrooms for Bentley and BMW are within a kilometre of the club in Tunbridge Wells – it’s such an affluent area, we thought if we can’t make a gym work here, we might as well give up!

It’s an old gymnastics facility, so loads of the infrastructure was already in place, including a foam pit, which has allowed us to create a Parkour, street-running park.

We opened on 23rd November after a 30-day turnaround, adding a restaurant, widening the reception area and bringing in new kit from Core Health and Fitness, Carbon Claw and Xenios.

What are your future plans?
It’s our goal to launch two more self-funded clubs within the next three years and we’re looking for sites in Worthing and Eastbourne. After that, we’re open to anything: mergers with other chains or a private equity acquisition.

What are your predictions for the health and fitness industry?
More focus on boutiques and small group training. I also think people will get fed up of data and technology and want workouts to be more simple. There will be more cross training, but less club hopping – people will get bored of going to different places because they won’t build a community. So, I think we’ll see more ‘clubs within a club’, offering an interesting mix of facilities.

Sign up here to get HCM's weekly ezine and every issue of HCM magazine free on digital.
Alan McGuinness
Alan McGuinness
Gilbert and McGuinness look for industrial units in residential areas
Gilbert and McGuinness look for industrial units in residential areas
The Underground Gym offers a combination of combat, strength and Parkour/calisthenics
The Underground Gym offers a combination of combat, strength and Parkour/calisthenics
https://www.leisureopportunities.co.uk/images/imagesX/156873_625136.jpg
Underground Gym's co-founder, Sol Gilbert, talks about breaking the rules with a new gym model
Sol Gilbert, co-founder: Underground Gym ,Sol Gilbert, Underground Gym, combat, strength, Parkour
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Strength training has moved from the margins to the mainstream.
Opinion: Building smarter strength spaces for today’s operators
Featured supplier news
Featured supplier news: Introducing a new era of Nautilus Leverage
Strength training has never been more important for member retention, facility differentiation and long-term commercial success.
Featured supplier news
Featured supplier news: Legends never die: four legends, four philosophies of life
Panatta brought together four of the most influential figures in bodybuilding history on the stage of RiminiWellness 2026: Phil Heath, Lee Haney, Ronnie Coleman and Hany Rambod.
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Company profile: Spirit Commercial Fitness
Spirit Fitness is a premier brand within the Dyaco International Inc. portfolio, a global leader ...
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Company profile: EGYM UK Ltd
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Supplier Showcase - From nightclub to health club
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Catalogue Gallery
Click on a catalogue to view it online
Featured press releases
Speedflex (UK press release: Inclusive Fitness in action: The Speedflex Blade at Gym Possible
Following the successful installation of the Speedflex Blade at Gym Possible, the UK based charity gym dedicated to making exercise accessible for people with physical disabilities, the innovative training solution has quickly become one of the facility’s
Featured press releases
BLK BOX press release: Inside the Player Gym at The Open, equipped by BLK BOX
The performance facility at Royal Birkdale gives the world’s leading golfers access to strength, conditioning, mobility and recovery equipment throughout Championship week.
Directory
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Aquaform s.r.l.: Water experiences and hydrotherapy solutions
Fitness tracking platform
SpiviTech: Fitness tracking platform
Spa and beauty equipment
Living Earth Crafts: Spa and beauty equipment
Industrial washing machines
Miele Company Limited: Industrial washing machines
Hot tubs
MSpa International Ltd: Hot tubs
Lockers
Crown Sports Lockers: Lockers
Property & Tenders
Stratford, East London.
Lee Valley Regional Park Authority
Property & Tenders
Y Felinheli, LL56 4QN
Newmark
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Diary dates
21-24 Sep 2026
The Langham Huntington Pasadena , Pasadena, United States
Diary dates
06-08 Oct 2026
Messe Stuttgart, Stuttgart, Germany
Diary dates
22-22 Oct 2026
QEII Conference Centre, London,
Diary dates
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Koelnmesse Exhibition Centre, Cologne, Germany
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