I know that hybrids like the Prius (at least the older ones) use the inverter to charge the 12v battery with the EV battery to make the ICE beltless (no AC compressor, alternator, etc driven by the ICE) which is supposed to increase fuel efficiency.

College Fitness Centers

I attend a public (US) university and on-campus gyms seem more intimidating than a Planet Fitness.

Then again, I've never been to either place, although I almost went into my university's gym but chickened out last second. I'm worried about the issue in the greentext, and I don't really know where to start. I assume that at a gym you do structured workouts and not whatever you want.