Real Recognize Real Puns

3 strings are wandering in a desert. After hours of wandering they eventually find a bar. One string says to the others "hey guys stay here I'll go get us a drink". He walks into the bar and orders 3 drinks. The bartender says "sorry kid we don't allow strings here, get out of my bar". The string sadly walks out of the bar and tells his friends he couldn't get a drink. One of the other strings says "don't worry guys I got this". So he puts a sombrero and a fake mustache on and walks into the bar and orders 3 drinks. The bartender tells the disguised string "sure thing 3 drinks coming... Hey wait a minute! You're a a string aren't you? Get out of my bar!" The string obeys and rejoins his other friends. He tells them "sorry guys this bartender really doesn't like strings". Finally, the last string says to his friends "Not to worry fellas I got this, for real this time. So the strings ties himself and walks into the bar. The bartender recognizes the string and asks him "Hey you're a string aren't you?!" The string replied "No... I'm afraid knot"