Energy-Generating Gym Memberships

People toil in gyms every single day, expending energy that is essentially converted into heat that is not put to any good use. In fact, most gyms are air-conditioned in order to wick away all this heat to maintain a nice confortable temperature! This idea is to create gym equipment that functions to also generate electricity that can feed a power grid. Treadmills, bicycles, rowing machines, etc. seem to be pretty efficient machines to convert for energy generation.

Add this: membership fees would go down as energy-generation increases. Every member might have an energy card that tracks the amount of electricity that's generated by each individual member. The more the member visits and works out at a gym, the lower the membership fees. This makes sense because the member is essentially lowering the overhead costs of the gym, and perhaps the most loyal and hard-working individuals would benefit from free gym memberships!