I'm a single man and the only time I've been with a couple to a motel (the rest were in swinger clubs) I paid for the room. They didn't ask me to but I did, and I recall the husband being surprised and said something like, "eh look at this, he's paying, the last guy didn't offer to do this" or something similar, so I really think the single man should pay. If you guys can pay the room every once in a while great, but at least 80% of the time its up to the single guy, really, so that's my opinion.