Gyms are the stupidest invention ever. When I run past a gym and see a load of slack jawed posers running on the spot gazing blankly out the window it always makes me smile.
There are lots of things you can do outside a gym which are just as good or better - but most people can’t afford a barbell and the ridiculously expensive plates, never mind a squat rack. Even if they could, they might not have the space at home to put it. So gyms still have their uses. Also good for people who find it easier to stay motivated by going to classes and would struggle to keep it up otherwise.