My favorite Carlo Gambino story -

A few weeks before Joe Colombo was shot, he was sitting in a bar here in Brooklyn, with a bunch of his "guys" still celebrating his 48th birthday (2 days earlier). Carlo Gambino came walking in with a few of his "guys" and shouted at Colombo to stop the crap (about being on television with his Anti-Defamation League). After the yelling stopped, Gambino slapped Colombo on the face and walked out. Colombo just sat there, staring at the table.

(I had heard this story in the neighborhood, and read about it a few years later in a book about the NY Police Department, so I'm fairly sure its true.)