Some of you may have seen/heard this one before, but I love it and someone just sent it to me on email - nice to get reacquainted with a favourite old terrible joke!

A string walks into a bar with a few friends and orders a beer. The
bartender says, "I'm sorry, but we don't serve strings here." The string
walks away a little upset and sits down with his friends. A few minutes
later he goes back to the bar and orders a beer. The bartender, looking a
little exasperated, says, "I'm sorry, we don't serve strings here."


So the string goes back to his table. Then he gets an idea. He ties himself
in a loop and messes up the top of his hair. Then he walks back up to the
bar and orders a beer.


The bartender squints at him and says, "Hey, aren't you a string?"


And the string says, "Nope, I'm a frayed knot."