Gyms. I guess I get why it's motivating for people to be in a crowd while they are working out but I absolutely hate everything about it. Stuffy changing rooms, waiting for the machines, rank people not caring about their hygiene, gross guys trying to chat you up while you're pretending to be invisible, too keen class instructors or those who won't even bother with you... Even talking about it gets on my nerves.
This year I'm sticking to home workouts a bit more often and I'm realising that I don't actually hate moving, I just hate how I tried to do it in the past because when one decided to exercise, signing up for the gym was the done thing.