i don't know exactly where the exchange was, but more than likely a bar b/c i saw a bunch of them walking towards the bars in Mexican flags (and only Mexican flags..) and what not..plus, i've never heard of a house having an exchange at their house (at least on our campus).
OH - and the DI..they've been picking on the greeks all year. in september they had a huge article discouraging freshmen girls from going through recruitment..too bad we still got the highest number (ever on campus) of PNM's!