A drama about the experiences of inmates participating in a theater program at the titular prison, featuring actual veterans of the program. Sing Sing, a film from director Greg Kwedar, is set, as you might expect, in the famous almost 200-year-old New York State prison thirty miles north of the city called Sing Sing, the name being a distorted version of a Native American name for that area. I’ve only been aware of it through old Hollywood prison movies up until now. But this film takes place in the real Sing Sing of today. In a large auditorium in the…