Come see improv comedy troupes Rebels Without Applauze and Awkward Compliment at the Somerville Theatre in Davis Square. There will also be a few stand-up comics performing. Tickets are only $5 and if you get 4 Belly Laughs, 11 guffaws and 17 chuckles, then you got your money's worth. Anything over and above that is gravy. Sweet, wholesome, non-fat, caramelized sugar gravy. Whoa! There's one chuckle already!