Limelight, the documentary directed by Billy Corben, is perhaps the most apologetic, mournful retelling of a party animal’s life since The People Vs. Larry Flynt, or at least, Blow. Given Corben’s kid-gloves treatment of his subject—1970s-through-‘90s dance club kingpin Peter Gatien—you may, by the end of this coke-fueled, debauchery-drenched saga, confuse Gatien with Saint Teresa of Avila herself. But whether you