On a recent visit to Poland I hadn’t really intended to go to the theater. But as I was on my way to my hotel in Krakow I passed by a small theater called STU. If it weren't for a poster, I wouldn’t have noticed that the residential-looking building had a theater inside. The title on the poster – "Ay Vay, or Stories with Cinnamon” – made clear what I would be doing that evening, though not...