When we first meet Rick (Burton Cummings), he's playing the piano completely naked. Only his buttocks are shown. He does stand up, but he puts a sheet of music in front of his penis before he does.
Character Melanie (Glynnis O'Connor) is shown topless when getting out of bed. This occurs during the first part of the movie, when she is at home.
There are some women showing their bare chests in a topless bar.