Blues Brothers was one of those movies that I loved to show to Chinese students. Not because its a good movie (actually pretty low by my standards) but because it introduces, in its own goofy way, a whole sub-culture that most of them would otherwise never know existed. And damn! were those guys funny. I've used the visit-the-penguin scene, with sound turned off, to teach the misuse of bad words.
ditto for the joe cocker take-offs on SNL. He did two of them; one where he rolled off the stage, another where he went onstage alonside Joe Cocker while Cocker performed("feelin' alright", IIRC). Both had me in tears.