Some ideas need a long time to gestate, and maybe the idea of spending your lunch hour watching live drama was just one of them. But this year did mark the return of Lunch Time Theater, an elegant little plan to coax office-workers into a theater with the promise of short, entertaining plays and cheap, crunchy lunches. Actors Theatre of Phoenix first trundled out the concept in the late '80s -- known then as Brown Bag Theater -- and it worked for a few years before going on a decadelong, er, hiatus. But in its new incarnation in the Herberger Theater Center, it seems to have found its niche -- presenting one-act plays by up-and-coming companies, while audience members chew on turkey sandwiches, diced fruit and little bags of chips. It's win-win-win. Actors get to hone their chops, troupes get to test out new scripts, and stultified office drones get some really cheap entertainment: $5 for admission and $5 for lunch, catered by Teeter House. And its year-round schedule has helped put the lie to the notion that, during the summer, the Valley's theater scene is pitch black.