A different slant:
When I was in Japan I trained in a university dojo (exchange student) and I remember one female student who always came to watch but rarely, if ever, trained. I assumed she must be the girlfriend of one of the other members or something but one day, I asked about her. Apparently, she used to train but got injured as a first year. She was now a fourth year and had attended almost every class, watching. Why? Because she was a member of the club. She always seemed quite jovial about it and she did join in a few times but was very careful. Once you join the club, you are a member and that's it, and if you don't have class, you have to turn up for training.