Probably a VERY stupid question...
I just watched B&C&T&A for the first time this afternoon (I recorded it off of TCM late last night). Assuming that Turner Classics may have edited some of the content a bit for TV, I couldn't tell if the four of them fully went through with the "orgy" or not. In one shot they were all four in bed, with Bob&Alice and Ted&Carol kissing, but then the next shot was of Carol and Ted sitting up looking a bit uncomfortable, almost as if thinking "what are we doing?", and then the four of them were walking down the hallway fully clothed, heading for the Tony Bennett concert.
I'm just not sure if they actually "did it" or if they stopped at the kissing point. It looked to me like Ted was watching Alice out of the corner of his eye and vice versa when they were each kissing their friends' mates, so I got the impression they were not entirely comfortable.
BTW, Natalie and Dyan were just terrific and Elliot Gould was hilarious.