What if there was a private gym for tweens and teens to workout under supervision. Where they can come and enjoy themselves but still work out at the same time. There would be a pool and café that served low calorie meals as well. Also the equipment would be professional. The teens would learn how to use it carefully and correctly though. This business would except ages 11-18. There would be a facility for males and a facility for females so no one feels unconftorable as well.
I have the same thought as Susan. Such a gym would be practically empty during school hours. While I see it as a wonderful dream, I also see a lot of obstacles that would stand of the way to make this dream a reality. Cost is probably the greatest factor.