Unfortunately, I cannot for the life of me find any sort of description of what I'm after: That sort of gentleman's-club-cum-brothel, a là the Hundred Guineas Club (even a higher-class brothel would do in a pinch, I suppose).
Fact or timely fiction, I just need a better picture in my mind. I don't want to lead the men into a featureless limbo.
I've searched far too much to give you the terms, but my problem is that I cannot seem to escape from results on the gay panic of the gay nineties, if not before. I am well-versed in that, trust, but it's really not what I'm after.