Well, even though the Mimi and myself attend Marymount Manhattan, I would have to disagree. Doing something really out there and "funky" for an audition is very risky and I really wouldn't suggest it. I would say just make sure you're well prepared, and don't do monologues that are found in monologue books or other done-to-death pieces. If you do something different and unique to yourself and your own talents, they will remember you more than they will remember someone who does the infamous Tom in MENAGERIE monologue for the 750th time that day. Just be yourself...but I don't think that the qualities MMC looks for are any different from any other theatre school. Just have fun, and relax.
"If you are going to do something, do it well. And leave something witchy."
-Charlie Manson