We had the most patient upstairs neighbors ever in one apartment in the dorms.
My room-mates would always get stoned with our downstairs neighbors and sit in the living room, and I'd try to do homework in my room in the back.
They'd be listening to Phish, the Dead, Hendrix, Marley, etc., turned way up on speakers with these 15 inch woofers, stoned off their rockers, banging out chords and patterns on the guitar.
Anyway, one of the guys in my physics class was living upstairs, so about 2 months into the term I went up there to ask him a question.
The music from our apartment was SO FRICKING LOUD that it actually was SHAKING their apartment, but they never came down to tell us to shut up. (Or maybe they did tell my room-mates and they were stoned off their rocker).