There are only so many dramatic themes upon which a writer can draw. Perhaps the most exploited and repetitious genre is the erotic psychological thriller. How can a writer, director and cast freshen up the beauty-who’s-really-a-nutcase thriller? I’m not sure anyone associated with this production asked that question, let alone attempted to answer it. Lacking in subtlety, dimension or suspense, “The In Crowd” will most likely appeal to adolescent males hoping to see young women in very little clothing. I think even they will be disappointed.