This answer is not going to make any sense, but anyway I will explain,
I am divorced, but when I was married I would have enjoyed joining a swinger group or being in that scene, it turned me on, especially to see my wife dressed ultra sexy in that environment, and what ever happens happens,
On the other hand I can’t see how two people can remain committed to each other when they are having sex with multiple partners every week. I would assume natural jealousy would start a split that could not be repaired.