“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A dangling participle vesion is:
 
“A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes pleasantly.”
   
The dangling participle joke was posted on Language Matters on September 20, 2014. (This date may be incorrect.) The joke became popular in February 2018.
 
“A dangling modifier walks into a bar. After finishing a drink, the bartender asks it to leave” is a similar type of joke.
         
   
Language Matters     
Saturday, September 20, 2014
Updated Humour for Intelligent People
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1. A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes pleasantly.
   
Twitter
Gwen Thompson
@GwenBThompson
A dangling participle walks into a bar. After finishing a drink, the bartender asks it to leave. http://ow.ly/JGXC4  #grammar
1:32 PM - 26 Feb 2015
 
bluebird of bitterness
Bar jokes for English majors
February 20th, 2018
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A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes pleasantly.
   
Twitter
Mother_of_Crows
@Mother_of_Crows
A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes… https://fb.me/7cKYzQbmG
1:21 PM - 26 Feb 2018
 
Google Groups: Dicta
After bad new, a few things to make us smile
anna.durbin
Feb 26, 2018
(this was shared by my fellow English major classmate.)  But RIP, Susan.  We miss you.
(...)
A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes pleasantly.
 
Reddit—Writing
A dangling participle walks into a bar… (self.writing)
submitted March 10, 2018 by Pale_King101
A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes pleasantly.