A guy walks into a bar and orders a fruit punch.

This joke plays on a classic comedic device: wordplay, specifically a pun. The humor hinges on the double meaning of the word "punch." Initially, the guy orders a "fruit (Review) punch," referring to the beverage. However, the bartender cleverly twists this to imply a physical "punch" or a queue, leading to the "punch line" – a literal line of people waiting for fruit punch. It's a delightful linguistic trick that takes a common bar request and turns it on its head.

Bar jokes, as a category, often rely on these kinds of misunderstandings, absurd situations, or clever plays on words related to drinking, ordering, or the general atmosphere of a pub. The setup of someone walking into a bar is a time-honored comedic trope, instantly signaling to the audience that a joke is coming. This particular gag then builds on that expectation, delivering a "punchline" that is both literal and metaphorical, creating a satisfying chuckle as the listener connects the dots.