Buy a Guinness in Coho Theater’s lobby before entering the intimately-lit set of Two Pints, and when you find yourself facing a flawless facsimile of an Irish pub, watching a barkeep glide by with a rag and tray of glasses—well, you get the point. You're there. You're in the audience, but you're also in a pub with two old Irish guys. To be honest, this would all happen even if you don't buy a Guinness,...