I was the guest of the owner and wife of one of the Toronto swing clubs a few years ago. It was quite nice to spend most of the time in the pool as the owners introduced me to friends. I was known to them due to my website libchrist.com, and I have been a featured speaker at the old Lifestyles convention and filled a convention room a few years on the topic "Swinging Christians, not a Biblical Conflict." Interview tapes and presentations were available from the Lifestyles Organization for many years.
How this started was interesting. The minister with theological degrees who co-founded with me decided to call to perhaps be an exhibitor at the largest swing convention in the US. It turns out the person on the phone was the daughter of the founder, and shortly after, we received a call from the head organizer wanting us to be a speaker instead, and we did for a few years.
But I was never a participant in the usual swinging things since I am more into intimacy and sensuality than the usual sex stuff. Just recreational sex of swinging was never my interest. The "recreation" aspect was to protect from jealousy which was/is a HUGE issue with many men, even some in our group that were more friends with benefits vs the typical swinger.
Also hosted a Liberated Christians Couples group in my home with about 200 members. Ironically "what to do for single men" issue is what got me interested in sexwork since unless exhibitionists, most couples and swing clubs do not want single men. When we were featured on the front page of Phoenix New Times (the backpage folks), we had zillions of emails from single men, that we could not help other than suggest escorts etc.