name of movie needed

[lazyfatboy]

im looking for the name of a movie, i dont know whos in it but i last seen it in the early 90s, its about a dance school. in 1 scene a guy is running from a woman with a witches mask on, he runs in to a hall with a stage and there is a guy with a chicken mask dancing with 2 women, the guy sits on a chair and watches the 3 people fuck on the stage, after a few mins the guy on the chair sees the woman with the witches mask is sucking his dick so he gets up and runs away, he then sees a woman on her hands and knees in a hallway but her head is under some clothes, so he fucks her up the ass until she turns and looks at him and its the woman with the mask, so he runs away again.
does this sound familiar to anyone? i know its a long shot but it like to see it again
thanks