The most successful personal development clubs are focused very narrowly: AA, weight watchers. These are the things that provide massive value to people because everybody is in a similar position and the objective is very clear. Stop drinking, lose weight.
I feel that personal development is too broad a topic... People will rarely have shared goals in the category of personal development. Except in the really general sense.
What could you do that is specific but also teaches people to grow? Lessons learned in weight watchers or AA can spill over in to all areas of life. You could set up the next big thing.
