In the chilly, dark room at the back of this wonderful downtown building, in a space normally reserved for play rehearsals for Herberger residents Arizona Theater Company and Actors Theater, daytime magic sometimes happens. Lunch Time Theater is a going thing at 12:10 p.m. on Tuesdays, Wednesdays, and Thursdays in the recently renamed Kax Stage. Showcasing the work of young, emerging theater companies, Lunch Time Theater offers up one-act plays lasting 30 to 45 minutes, to which daytime playgoers can bring a lunch or pre-order one from Lunch Time's own caterer. Tickets are a measly $6 apiece, not including lunch, and the short plays and musicals are top-notch stuff from seldom-seen, smaller local troupes. (Last season's schedule included work from the Improbable Theatre Company and popular Theatre Artists Studio.) Most shows offer an evening preview performance of each show on the Monday night of opening week, too.