Mike Birbiglia backstage at the Beacon Theatre in March. He says he favors simplicity in his work: “Mike’s gonna tell a story.” - Credit: Photographs by COLE WILSON In his twenties, the comedian, director, and actor Mike Birbiglia learned to play the guitar because of its theatrical simplicity. “I always admired people who could walk into a bar and just… that’s the show,” he tells me. He liked the idea of not having to tech beforehand. No sound check. No cast. “I am the — this is the show.