The Greek mask carvings on the Wilbur Theater facade suggest you are in the heart of the Theater District that runs for several blocks on Tremont and Boylston Streets. Boston’s first theater opened in 1793 and, at the peak in the 1940s, there were 50 theaters. Today, there are still dozens of theaters, playhouses and centers offering everything from Broadway shows, dance, opera and, in the case of the Wilbur, comedy clubs.