Drinks with the dorm

Camp reunion- very fun and very interesting night. First we had all you can drink and eat for 2 hours, for $30AU ish, then a group of 20 or so of us went out to a bar after and had drinks bought for us all night by a guy who used to live in the dorm and just happened to run into us... The system here, put extremely simply, is that seniors must pay for their juniors, so this poor guy ended up paying for over $400 worth of drinks that night- nothing I could do about it...