“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” An anti-joke version is:
 
“A priest, a minister and a rabbi walk into a bar. Legally, bars in America have to serve people of all religions.”
   
“A priest, a minister, and a rabbi all walk into a bar. Bars serve people of all religions” was posted on Twitter on December 3, 2010.
 
“A priest, a rabbi and a minister walk into a bar. The bartender says, ‘What is this, a joke?’” and “A priest, a minister and a rabbit walk into a bar. The rabbit says, ‘I think I might be a typo’“ are other joke versions. “A priest, a minister, and a rabbit walk into a blood bank. The rabbit says,  ‘I think I might be type o’” is a related joke.
 
   
Twitter 
Ariel Baker‏
@nicegogoboots
A priest, a minister, and a rabbi all walk into a bar. Bars serve people of all religions.
11:26 AM - 3 Dec 2010
 
Twitter
Stephen Crociata‏
@SCrociata
A priest, a minister, and a rabbi all walk into a bar. Bars serve people of all religions.
9:56 PM - 9 Dec 2010
 
Twitter
david disque‏
@ahoylissa
a priest, a rabbi, and a minister walk into a bar. Bars serve people of all religions.
8:30 PM - 20 Feb 2011
     
Musings of an Overachiever
JUNE 9, 2011
A rabbi, a priest, and a minister walk into a bar. Bars serve people of all religions.
 
Experience Project
A priest, a minister, and a rabbi all walk into a bar.
Bars serve people of all religions.
memyself12memyself12 May 1, 2013 in Jokes & Riddles
 
Twitter
Scott “It’s Turbo Time” Niswander‏
@ScottNiswander
Replying to @Bosslevel8
@bosslevel8 A priest, a rabbi, and a minister walk into a bar. Bars serve people of all religions.
12:23 AM - 26 Oct 2015
 
ViraLuck
The Funniest Anti-Jokes
2017-07-22 Viral LuckThe Funniest Anti-Jokes
(...)
21 A priest, a minister and a rabbi walk into a bar.
Legally, bars in America have to serve people of all religions.