I’ve had an interesting, and contrasting, several weeks of theatergoing.Last week started out with the style and grace of the Black Ensemble Theatre’s tribute to the elegant queens of the entertainment world, Lena Horne and Nancy Wilson.This week, I suddenly I found myself face to face in an encounter with the outrageous Joan Jett Blakk, who is running for president of the United States as “the first queer, black drag-queen presidential candidate.”Actually, I was attending a performance by Tarell …