“Mr. Sinatra,” said the teen-age boy, “my name is Bernie Rosenberg. Would you please do me a favor?”
“What kind of favor?” Sinatra asked.
Well, I’m here with my girl and I want to make a good impression on her. I certainly would appreciate it if you would drop by my table and say ‘Hi, Bernie!’”
“OK, kid, I’ll try,” said the singer, smiling.
A little later he dropped by the boy’s table, and said, “Hi, Bernie!”
The boy looked up at him and snapped, “Don’t bother me now, Frankie. Can’t you see I’m busy?”
*[This joke that goes way back; you can use any celebrity and it works. This version is normally attributed to comedian Don Rickles. If you don’t know who Don Rickles was, find some of his bits on YouTube before the PC police wipe out his existence]*