What are the trends in new types of fitness clubs like clubs specifically for cycling, rowing or those for certain populations?

Flywheel is taking off like crazy. It’s a spinning class with the exception of the great upbeat music and the screens they have in their studios where the participants can see themselves competing with each other. I think they even have live DJ in their studios right now which makes the workouts even more fun. The fact they have added the competition section in their classes, attracts a lot more of attention from all kind of people. I’m not a fan of spinning, but I like taking these classes just because of the competition factor.