He also took part in Easy Rider: Shaking the Cage (1999), a documentary about the making of Easy Rider DVD, and the 2003 documentary Easy Riders, Raging Bulls: How the Sex, Drugs and Rock 'N' Roll Generation Saved Hollywood. Askew sang Muddy Waters, Howlin' Wolf and Jimmy Reed songs at The Gaslight Cafe. According to Bob Dylan, when Luke sang at The Gaslight Cafe it was like a "guy who sounded like Bobby Blue Bland".