Expect some personal insights and salty language when the great playwright Tennessee Williams comes to town. Well, he’s not with us anymore, but “Confessions of A Nightingale,” by Charlotte Chandler and Ray Stricklyn, will make you feel as if he’s still alive, kickin’ and observing the world. Mike Seely directs Roger Fristoe as Williams in the one-man show based on Chandler’s book “The Ultimate Seduction.” This is for people 15 and older.