The show Blue Man Group, now playing at the Venetian hotel in Las Vegas, Nevada, is an experience to tell all your friends about, but their reaction could be that of a questioned look and they just won't get it themselves unless they go.  They will ask "What is it?" and trust me, you'll be stumped to come up with just the right way to describe it and justify just how talented these guys are.  Is it a rock concert?  Is it a comedy show?  Is it for kids or adults?  Are they percussionists?  Are they artists?  Why are they blue?  You'll find yourself defending them.  They're blue because...