Improv comedians are a human breed originally formed from the tears of a vaudevillian and the psychoactive film on a tree frog's back. Breed your own comedy with today's Groupon: for $9, you get a pair of Friday night tickets to an improv comedy show at the Blue Door Theatre (up to an $18 value). The Blue Door Theatre’s family-friendly Friday night performances engage audience members of all ages with an imaginative troupe of actors dedicated to creating humor on the spot as they are gently toasted by footlights. A local nonprofit supported by a cast of volunteers, the theatre caters to the whims of up to 66 viewers who shout, chirp, and guffaw gleefully from the darkened intimacy of the house. The Friday evening humor is rated between G and PG, and avoids comedy that might stifle, stultify, or offend. Alongside its featured displays of drollery, the Blue Door Theatre offers adult and youth improv classes (at an additional fee) for aspiring cast members.