20. Adam Breeden — Cofounder of Social Entertainment Ventures

Now the cofounder of holding company Social Entertainment Ventures, Breeden has been the brains behind London going-out hotspots like bowling venue All Star Lanes, Bounce ping pong, Flight Club darts bar, and Puttshack digital golf.

Not only have his concepts changed the nightlife scene in the UK capital, but they've also hit US shores with locations in Boston and Chicago — and there's more to come, with plans to put a "groundbreaking twist on bingo" in the works.

Read more: This former dishwasher turned 'social entertainment' bar founder changed drinking culture in London and the US — and he's about to launch a new £6 million concept