Things of St.-Patrick's--Day-Ness
Art History featured sharing of flags and teasinating of Rory with a side-order of backdrop-painting.
Music -- which Xander is not in, so he was not there, saw an appearance by the elusive Twinkie-thief. And some people in leather pants (and skirt yay go Ninja Vin Diesel). This is a complete coincidence. And also Xander was not there.
He was in the common room just long enough to follow Rory and a bunch of other people off to Bridge's place for a game of I Never. Which he totally won. Not because he was the last person to pass out, but because he was smart enough not to touch the spacevodka, and that so counts as winninating in Xander's book.