If I were to go to a swinger's club as a single male, and was hit on and asked to join by a male/female couples as a bull, etc., I would get too excited and not be able to relax to have sex with them.
Now, on the other hand, if I were to hire a male escort (female is out of the question because there is too much victimization, etc.), I'd have more time for him to relax me, and help me get in the mood with massages, etc. Also, with a male escort, I wouldn't be interested in anal or oral sex. Massage, feeling up, kissing maybe, and hand job is all that I would be into. I might manage quiet well.