Liteiny Theatre is a long-running drama theatre near Nevsky Prospekt, useful if you want a smaller stage after seeing St. Petersburg's grand imperial venues. Its repertoire is in Russian, so it is best for travellers who understand the language or are happy to treat the evening as a local cultural experience.
It is not as visually important as the Alexandrinsky or Mariinsky, but it gives a glimpse of the city's everyday theatre scene away from the biggest-name houses.