The house lights came up suddenly, and the performer Ryann Redmond announced, “Tonight, the role of Scott Hunter will be played … by one of you.” A chorus of oohs and ahhs rippled through the audience at “Heated Rivalry: The Unauthorized Musical Parody,” which opened on Tuesday at the Culture Club in Manhattan. This cheerfully bare-bones, affectionately barbed parody of the hit TV show mainly skewers the secret romance between two professional hockey players, the Canadian Shane Hollander (Jimin