I think the biggest problem is that straight men in particular often seem to have the misguided notion that any gay man must be after them, which is really rather sad, funny, but sad! That is basically the equivalent to saying every female they encounter must fancy them, which they don't!!
Where i can see how some people would maybe feel slighlty uncomfortable in such a position, we each have a choice, and if it makes us uncomfortable then we simply shouldn't take on work in that area. Everyone has their own personal comfort zones after all. Personally it really doesn't bother me in the slightest what sexuality anyone is, it's their own business, and to me a job is a job no matter which type of event or club it would be in.
I have worked in lapdancing clubs before, and despite the fact it isn't somewhere i would personally chose to spend my free time, it is just a job. Granted the excess of very well endowed women nearly naked can make one feel rather inadequate, but each to their own.
Maybe also patrons of gay clubs may not feel overly comfortable having straight
door supervisors either, i can see how it can cut both ways there.
The way i see it either way and at any type of club, male staff are feeling up blokes in the name of searches, and females are searching other females, and usually the women have a damned sight less on than the men and there is nothing worse than searching a female in barely any clothing.
Never really see people as gay or straight, to me they are all just people, gay, straight, blue or green, all the same make up underneath the skin.