No, it says that the Hellfire Club was a parody of the Satan worshippers and loosely based its rituals on those of Satanism. It also says that the club was rumored to be Satanic but was more of the Venus/Bacchus worshipping. It also sounds as though many notable figures of the times were participants. I don't think the reference is completely untoward but I think your point is valid that it could be construed that swinging might have satanic origins. Technically though, Early Christians believed that the Romans were pagans which they saw as evil. Witches cabals could also be seen as a form of swinging as they were supposedly orgiastic worship of the devil. I doubt there is a direct line of evolution between any of these things and if one were to approach it scientifically these other issues would be irrelevant. This does merit some thought but based upon the scope and nature of the Wikipedia, I doubt you would be able to enforce a narrow definition that did not address the mythology. Perhaps, that is what needs to be done, clearly state that any other references are to show how historically this activity is commonplace but there is no true correlation between the orgies of witches or Roman and modern day swinging. It's late and I don't know if I am making sense or not. Let me know
