The Strings

Three strings walked into a bar and sat down together at a table.  After sitting for a while, one of the strings became impatient and called for a waiter and ordered three beers.  The waiter said “we don’t  serve strings in here, get out of here!”.  The string said “we might as well go somewhere else, they will not serve us here”.  The second string said “let me try”.  He called for the waiter and asked for three beers.  The waiter said, "Look man, I already told your friend we don't serve strings in here, now get out"! The third string said “I'll handle this”.  He stood up and tied the top of himself into a knot and then frayed the ends.  He went over to the bar and said “bartender, let me have three beers”.  The bartender said “aren’t you one of those strings?”  The string said “I’m afraid knot”.