Well, it wasn't my wedding day but my cousin's. We are from the UK and she married a boy from the county next-door, and there are rivalries. All went smoothly, however, until the reception, when some of the young males on both sides had drunk more than a few beers. They started an argument - of all the silly things to argue about - as to which county had the best beer! Because they'd all been guzzling so much of the stuff, it escalated until it was a free-for-all like those bar fights in movies. The police were called and several of them were arrested. My poor cousin was devastated. She never got on with her in-laws and she's now divorced.