The easiest group costume EVER! We all came to work in black clothes. We all donned skull caps and painted ourselves blue with really shiny blue cream makeup.
We cut up a few PVC pipes we had leftover from a job site and Voila! Homemade Blue Man Group Costume!
We always make an entrance at our office party so we put the funky Blue Man music on the PA system and ran around the office banging on our pipe!