‘Swingers’ would throw their car keys into a pot in the middle of a swirly-pattern carpeted room, have a few Campari and sodas and then pick out a set of car keys at random from the pot.
Men with helmet-hair would inevitably end up with their mate’s wife who they’d always hated, fail to get it up and end up shaving off that Zapata moustache.
The only scenario worse than this was if a macho man ended up with his own wife and enjoyed it.