I'm not sure whether it's the right sub-forum, but here is a little story I thought worth mentioning:
Recently there was a girl training in our gym and she didn't raise her hands in front of her face for defensiv position. When asked why she didn't she replied that she didn't want to. And now guess why - She didn't wan't to raise her hands, because the gloves she borrowed from the gym were smelling so badly
...at least it's an effective way to make newbees get their own equipment as quick as possible
Ever happened something similar in your gyms¿