As well as being the such a load of toss, Rugby Union seems to have a plenty of "games" played in the clubhouse afterwards. Those that I remember the RA-RA brigade playing whilst at Poly were;
Vomit and urine drinking competitions, seeing if they can drink a pint before they get singed by the trail of toilet paper which has one end stuck up their arse and and of course the classic "how many coins can you fit up your foreskin?"
So, do other "sports" have equally bizarre rituals in the clubhouse?