This is going to sound terribly snobbish, but in my day there was an etiquette to training in the gym. Swearing, throwing weights around in a dangerous manner and putting your shit away was the order of the day. Nowadays, at least for a few people, they don't seem to care how they behave. It's no wonder some people feel uncomfortable in going.
PS. And, in case you're wondering, it's the guys who are the culprits.