Backstory: I'm getting tired of spin classes and tried rowing by myself and loved it, I wonder why there aren't any group versions.

The Idea: A group rowing class.

Deep Dive: Similar to Soul Cycle or Fly, you would create an exercise studio where instructors would guide classes through exercise routines.

Validation: These classes already exist for spinning.

Monetization: You would charge a membership fee for each member and allow to them to attend a set number of classes each month. You could also have an unlimited plan, you would have to play with the different pricing tiers.