A couple of years ago, I was viewing the website of a Pro Dominatrix. (Wish I had bookmarked it.) I think she offered this service at least once a month, maybe more. She would gather up a few of her dominant friends, and offer a thirty minute spanking session. Each woman would have their turn spanking the sub while all the others watched.
I think she charged $150 for this service, and I actually e-mailed her about this and she said it was fairly lucrative as they would see a number of men on those days.
In my humble opinion as a submissive male, you can't go wrong offering this sort of session. I can't imagine a submissive guy that wouldn't want to try this. So much of submission is all about the humiliation. This would more than satisfy most men's CFNM fantasies, as well as giving them the additional humiliation of being spanked while other's looked on. I so wish someone would try this in the Houston area.
Any male subs reading this thread, speak up. Would this appeal to you?