At the start of each show an all-star ensemble creates a tableau onstage, then asks after a blackout, "Where in Chicago did that take place?" "Soccer practice" was the response the night I was there, and after an hour the improvisers--intensely alert and feisty--had crafted a veritable community, complete with idiosyncratic characters, unpredictable backstory, and tragicomic intrigue. Veteran T.J. Jagodowski, recognizable from a series of Sonic commercials he's done with quick-witted cast member Peter Grosz, played a thick-accented German coach. Abruptly launching a new scene by charging to the front of the stage, he squatted and gestured as he yelled at his coed youth team, "I will yank on your nuts like the Hunchback of Notre Dame working a bell!" --Ryan Hubbard a Open run: Tue 8 PM, Annoyance Theatre, 4840 N. Broadway, 773-561-4665, $8.