Cards Anyone?

This one requires a building tall enough to have an elevator, I'd probably try it as a college student where people will get less pissed. Set up a small card table in an elevator, and sit 2-4 people at a table and play any game from poker to go-fish. If somebody calls the elevator, everybody stare at them when the doors open. You can get creative but the basic responses are "10 dollar buy in if you're interested" and "this ones taken (immediately hit the door close button)". Good luck and post how it goes!

Update:

We got quite a few "what the hell is this", and one "This is the weirdest thing I've ever seen". My favorite was the Asian who actually wanted to buy in for 20 dollars. In the end I wound up getting written up for being a fire hazard (can't use the elevator during a fire anyways) oooh well.