Fireman in a Bar
A fireman walks into a bar and waves the bartender down. The fireman asks for a beer and offers to tell a joke about policemen.
The bartender replies in a cocky tone "Look guy... Im a retired cop, that guy shooting pool is a cop, and that guy 2 seats down from you is a cop. You still want to tell that joke?"
The fireman says "No, I dont want to have to explain it 3 times..."