“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A hexagon version is:
     
“A six-sided man walks into a bar and orders a gon. The bartender says, ‘What the heck’s a gon?’”
     
The joke was posted on Reddit—Jokes on May 28, 2013.
   
     
Reddit—Jokes
A six sided man walks into a bar
submitted May 28, 2013 by MacBookMinus
A six sided man walks into a bar and orders a gon.
The bartender says, “What the heck’s a gon?”
     
Twitter
funnypic
@funnypicRT
Jokes: A six sided man walks into a bar - A six sided man walks into a bar and orders a gon.  The bartender says, ... http://ow.ly/2xcTiF
1:23 AM - 28 May 2013
 
Twitter
Dylan
@dcon4L
A six-sided man walks into a bar and orders a gon. The bartender asks “What the heck’s a gon?”
5:26 PM - 28 May 2013
 
Reddit—Dad Jokes
A six sided man walks into a bar and orders a gon. (self.dadjokes)
submitted August 4, 2018 by keithasaurus
The bartender says, “What the heck’s a gon?”
 
Twitter
keepingitcreel
@Keepingitcreel
A six sided man walks into a bar and orders a gon. The bartender says, “What the heck’s a gon?”
7:09 AM - 4 Aug 2018