Two bowling teams, one made up of all blondes and one of all brunettes, charter a double-decker bus for a weekend tournament in Atlantic City. The brunette team rides in the bottom of the bus, and the blonde team rides on the top level.
The brunette team down below is whooping it up and having a great time when one of them realizes she doesn't hear anything from the blondes upstairs. She decides to go up and investigate.
When the brunette reaches the top deck, she finds all the blondes frozen with fear, staring straight ahead at the road and clutching the seats in front of them.
The brunette says, "What's going on up here? We're having a great time downstairs."
One of the blondes says, "Yeah, but you've got a driver!"