Another thing that I really hate is when I was attending spin classes at 6:00 a.m. in the morning there would be a lot of "saved" bikes with towels by friends for people who came in around 6:00a.m.
Oh, that has happened to me one too many times. It drove me crazy. I no longer do spin classes and I no longer belong to a gym. What I miss the most about it is the sauna, though.