Recruitment at a Huge Commuter school

[miaNYXnyc]

Hey Greeks, I'm rush chair of a Co-Ed Fraternity and having a little trouble with creating interesting rush events because we are a commuter school in NYC (20,000+ undergrads) and people don't tend to stay on campus when they don't have to.
And since this is NYC we obviously don't have a frat house to throw big parties at, so we have to work with the locations around the school.

Any creative suggestions that can be done in a small-ish location? (apartments/class rooms/parks etc)