My roommates and I did a costume themed pub-crawl where we dressed up as bank robbers. We had these plastic water guns and real hang cuffs and Venetian masks. We made a getaway car out of an old pizza box, painted it, glittered it, and took it for a test-drive. It was so much fun, because we really, really got into character and we'd interact with the other teams who also acted out their themes and characters. It was like a big, drunken cosplay that the entire town had got in on and it was a nice bonding experience for everyone involved. lol. For weeks afterward, we'd be approached.. "hey! I remember you. You were one of the getaway girls! What up, we were the food group..." etc.