A guy walks into a restaurant but the host won't let him be seated.
"You must wear a necktie, sir," the host said, "it keeps out the troublemakers."
"Okay," said the man, "I'll go get one out of my car." He goes back to the parking lot and looks and looks but cannot find a necktie anywhere. Looking around his trunk he comes across the only thing that might serve as a substitute: jumper cables. He puts them around his neck and, tying a neat knot in them, returns to the restaurant.
"Now can I come in?," he asks the host.
The host looks the man up and down, considering.
"Okay," he says, "but don't try to start anything." | 
