“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” However, during the 2019–20 coronavirus pandemic, most bars were closed. The joke was:
   
“A guy/man walks into a bar…lucky bastard.”
   
“A guy walks into a bar…Lucky bastard” was posted on Twitter by Fee Muir on April 13, 2020. “A man walks into a bar….. Lucky bastard” was posted on Twitter by Dan (and others) on April 14, 2020.
 
“A man doesn’t walk into a bar…,” “A man doesn’t walk into a pub…,” “An Englishman, an Irishman and a Scotsman don’t walk into a bar” and “An Englishman, an Irishman and a Scotsman walk into a bar. Those were the days” are related jokes.
     
   
Wikipedia: 2019-20 coronavirus outbreak
The 2019–20 coronavirus pandemic is an ongoing global pandemic of coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The outbreak was first identified in Wuhan, Hubei, China, in December 2019, and was recognised as a pandemic by the World Health Organization (WHO) on 11 March 2020.
     
Twitter
Fee Muir
@feemuir79
A guy walks into a bar…Lucky bastard
1:45 PM · Apr 13, 2020·Twitter Web App
 
Twitter
Dan
@DJisatwit
A man walks into a bar….. Lucky bastard.
1:20 PM · Apr 14, 2020·Twitter for iPhone
   
Twitter
Dylan Thomas
@DylanThomas90
A man walks into a bar…. Lucky bastard!
2:04 PM · Apr 14, 2020·Twitter for Android
 
Twitter
Martin
@Martinc279
Man walks into a bar
The lucky bastard
3:48 PM · Apr 14, 2020·Twitter Web App
   
Facebook
Vasco da Gama Taverna aka The Portuguese Embassy
April 15, 2020 at 4:28 AM ·
A man walks into a bar…....
...... lucky bastard
 
Twitter
Moira..
@isitreallymoira
Man walks into a bar…
Lucky bastard x
6:17 AM · Apr 15, 2020·Twitter for iPhone
   
Reddit—Jokes
Posted by u/_fox-on-the-run_ April 16, 2020
Guy walks into a bar
Lucky bastard