I don't know if the others will agree with me or not. Personally, I think the whole "meeting for a session" thing makes for a great fantasy. The problem is that it IS a fantasy wherein your partner is into everything you are no matter what it is.

In real life I don't think that's a very practical expectation. I don't know that meeting for a one time sexual experience in the context of bdsm would work. I'd see that as better suited to those with vanilla interests.