Elon Musk Booed During Dave Chappelle's S.F. Comedy Show

Elon Musk is getting a frigid shoulder in San Francisco -- as if the Twitter sitch wasn't bad enough -- he got onstage with Dave Chappelle, and was practically shouted out of the arena.

The comedian was performing Sunday at the Chase Center, and toward the end of his set ... Dave brought Twitter's CEO up onstage as a special guest, which the S.F. crowd did not receive well -- raining a chorus of boos down on EM.

A few cheers could be heard as well, but as Dave noted ... it was mostly folks who weren't happy, but he kinda told them to shut it and tried to drown out the noise with a few jokes about how much he actually liked Elon, despite him being public enemy #1 online.

As for Elon ... well, he rolled with it as best as he could. He sarcastically asked Dave if this is what he was expecting -- and DC responded, "It sounds like some of the people you fired are in the audience."

That got a laugh, as did some other cracks from Dave about the tense situation -- and all the while, Elon just sorta stood around and took it. Some were expecting him to say more, as he does on Twitter, but in the end ... Dave wrapped it up by telling people there were better ways to express their protests with the man.

Another surreal moment ... when, at one point, Dave asked Elon to shout his old show's signature outro line -- "I'm rich, bitch!" -- which Elon did ... to mixed results. Fun times.