What annoyed me about gyms? A lot of people who just like looking at themselves in the mirror was my main annoyance.
However, the thing that really pissed me off was I had done my workout and it was getting late in the evening, most people had gone home. I was in the pool just relaxing before a shower and then home. In walked an attractive female looking rather fit and spectacular in her gym gear. She claims she wanted to use the pool but had left her bikini at home and asked if I'd be offended if she swam in her underwear.
I'm no idiot, I say "not at all", so she strips off everything but her panties and jumps into the pool. My face would have looked a little like the picture in my avatar. Anyway, we start chatting, I'm trying to pretend not to notice what was on display, and she suggests we grab a meal and a couple of drinks. I'm thinking, "I don't know how I did it, but I've cracked it". So we get to a pub, having a meal, everyone's looking at me as if to say, "HE'S with HER?". Next minute, she starts trying to sell me a contract for her to be my personal trainer.
That really pissed me off. Probably would have worked on most guys, but I said I wasn't interested in a personal trainer. Funnily enough, she seemed to lose interest in me and the evening came to an abrupt halt after that. Stuff the gym.