A guy I've known or several years on another forum, lived in SF during the 80's & 90's. He's told the story a couple of times, about how he had a one night a week, part time moonlight job as a doorman at a well known (now closed) SF comedy club, where Williams & other big name comedians used to perform regularly. Said he got to know him a little. Said that he went (with some other people) to Williams' house once to trampoline in the backyard & late one night, Williams & a bunch of others came by he & his roommate's apartment to party. Said that he called his brother long distance in New Jersey & got Williams to holler GOOD MORNING!!! into the phone, then yelled at him for sleeping so late (it was 5 am in NJ).
I was never a big fan of his, but it is sad none the less.