Three strings walked into the bar, they sat down but they didn't get waited on...So the first string walked up to the bar and asked for three beers. The bartender said, I'm sorry buddy we don't serve strings in here. The string walks back to the table and and tells his friends what the bartender said.
The second string says I've been here before and gotten a drink, I'll go get us something to drink. The second sting walks up to the bar and politely asks the bartender for three beers.
The bartender says, Look I already told your buddy we don't serve strings in here and I think the three of you better leave...
Defeated, they leave...
Outside the third string says wait a minute, I've got an idea...so he twists himself all up and messes up his hair. Then he goes back into the bar and asks the bartender for a six pack of beer to-go...
The bartender looks at him and says, aren't you one of those strings I just threw out of here?? The string says No, I'm a frayed knot!

rimshot