Rope
A piece of rope walks into a bar and and sits down. The bartender says "Are you a rope?" The rope says yes. The bartender says "We don't serve your kind here, you're gonna have to leave." The rope leaves and heads down the street to the next bar. He walks in and sits down and the bartender asks "Are you a rope?" the rope says yes and again is asked to leave. The rope is pretty discouraged now and goes outside. As he's sitting on the curb he has an idea, he ties himself in a knot and messes up his hair and walks back into the bar. The bartender says "Hey are you a rope?" the rope replies "Nope, I'm a frayed knot."