Several years back, I was working regularly with a 5-piece group in the Memphis area. We had a large dinner/dance booked at nice motel for folks from several states around. The evening progressed normally with good food and dancing. At gig's end, the man in charge asked to use the microphone. Then is when we discovered the purpose of the meeting----a swinger's get-together! That was quickly evident when he described the various activites to follow (member's choice), including the swimming pool. We thanked them for the gig, collected payment, then left for home and our spouses, except for the drummer who was exceedingly curious and a little kinky. He said, later, that things really got interesting as the evening progressed---very educational to say the least. He said the group participatory activities were the most creative and interesting to observe.