I'm going to joke with a straight face to an acquiantance that he doesn't mix with peace and quiet
Why would you joke with an acquaintance about this?
It's funny to see him uncomfortable.
Joking with someone you don't know could backfire. Everyone has a different sense of humor. What you see as humorous may be harmful in their eyes.
No, I think he'll find it funny.
He might find it funny, but he might think it's offensive. I think it would be better if you waited until you knew him longer before joking around with him like that.