Also it's kind of odd how nowadays everyone goes to the gym. Growing up as a late-stage millenial, gym goers were a niche subculture. Now it marketed to everyone everywhere as this integral part of modern daily life.

Aerobics classes have been a thing for decades. Pumping Iron came out in 1977. When I was in college (UVA, 95-99), there were several good gyms, plus they built a fancy new one about mid-way through my degree.

I suspect you just happened to be in a time/place where gym use was lower than average.