Avery Seduction would probably be more of a risk on the way there and back. If you shower without the belt on, you would either be carrying the key or not wearing the belt to begin with. And since you seem to be exclusively into guys, the risk of seduction inside the locker room is probably tending towards zero, I doubt that entering a girls' locker room has positive effects on a boy's attractiveness.
Then there is the risk of assault, but I guess if you always make sure to have other people around you, that is only much of a threat inside the locker room if it is an outright raid.