Yeah, apparently this happened to my RA (residence assistant) that I have for the floor of my dorm at my college. As our gym isn't purely the college's (it's shared with the community, run by one of the local hospitals), anyone can use it as long as he or she has a membership and is an adult. I had thought about reporting the incident to one of the staff members, but I'm not sure what they could do about it. I'm just afraid of it happening again.
Also, my RA had it happen from a different man, so...