Looking for a good late March theme...

[CrescentGuy]

Hey, this is my first post. I'm social chair for the University of NE-Omaha Lambda Chis. I'm throwing a party on March 26th, but my entire fraternity (me included) is having a tough time choosing a theme. We have a lot of criteria to meet for this and that's why this sucks. First, our Mardi Gras party was huge and awesome, but we spent all of our money on it...so we don't have much money, but we need to keep that momentum up until our co-party later this year with another fraternity on campus. Second, we've done a lot of the regular themes and are looking for something new and cool this time. Third, we have to be weather-conscious, because it will more than likely be kinda cold and rainy here in Nebraska. Fourth, due to the combined rules of our nationals, our school, and UNO's IFC, we can have no kegs or hard alcohol at parties (beer in a can is fine). Kinda sucky, but we need to choose something pretty soon. Any suggestions?