Expanding on this, I've convinced myself that the whole couples dinner thing exists primarily to entertain the other diners. The way it's set up an an obnoxious and increasingly grotesque public spectacle which I suspect the vast majority of couples would find highly uncomfortable supports this, as does the remarkable timing of the (presumed fake) removal of the fraudulent couple and Tendi/Rutherford being allowed to leave on a flimsy pretense after putting on a pretty good show of their own.