Spin

Cycle to gym. Cycle at gym. Cycle from gym.
So, obviously the social dimension to exercise is important for people. These places resemble luxury hotels but have the allure of nightclubs. But all that spinning going nowhere is a crime. You could easily light the whole building with all that exercise going on, or power the music system the spin instructor uses. The faster the music, the greater the adrenalin, the faster the pedaling...