“A number 12 walks into a bar…” (bar joke)

“A guy walks into a bar…”  is a typical form of what has been called the “bar joke.” A number version is:
 
“A number 12 walks into a bar and asks for a beer. ‘Sorry I can’t serve you,’ states the barman. ‘Why not?!’ asks the 12. ‘You’re under 18.’”
 
The joke has been cited in print since at least 2002.
     
 
Google Groups: de.talk.jokes
req: hat jmd einen joke über genetik parat?
Lothar Cezanne
3/11/02
A number twelve walks into a bar and asks the barman for a pint of beer.
“Sorry I can’t serve you,” states the barman.
“Why not?!” asks the number twelve with anger showing in its voice.
“You’re under 18,” replies the barman.
     
dr1
ok, but i think you’ll regret asking
mobrouser
10-05-2003, 12:24 PM #3
(...)
a number twelve walks into a bar and asks the bartender for a pint of beer.
“sorry I can’t serve you,” states the bartender.
“why not?!” asks the number twelve with anger.
“you’re under 18,” replies the bartender.
 
Southwest
Bar Jokes
‎08-11-2006 11:18 AM
jhallen
TGIF! It’s been a rough week, so I’m in need of some additional material. I’m hopeful that this will spark some of you to help add to my collection.  A sandwich came into a bar one night. The bartender stepped up and saw plainly that the new customer was a sandwich and shouted, “Hey get outta here we don’t serve food in here!” A number twelve walks into a bar and asks the bartender for a pint of beer.  “Sorry, I can’t serve you,” states the bartender.  “Why not?!” asks the number twelve with anger showing in its voice.  “You’re under 21, ” replies the bartender. Enjoy!
 
Twitter
Tom Cahillane
‏@dmcscorp
Number 9 walks into a bar and asks for a beer. Bartender says, “I can’t serve you.” “Why?” ask the number nine. “Cause you’re under 21!
8:13 AM - 2 Oct 2009
 
Twitter
Daily Groaner
‏@DailyGroaner
A number 12 walks into a bar and asks for a beer. “Sorry I can’t serve you,” states the barman. “Why not?!” asks the 12. “You’re under 18.”
1:06 PM - 9 Nov 2009
 
Google Books
The Best ‘A Man Walks Into A Bar’ Jokes
By Billy Brownless
Crows Nest NSW, Australia: Allen & Unwin
2009
Pg. 14:
A number 12 walks into a bar and asks the bartender for a pint of beer. ‘Sorry, I can’t serve you,’ says the bartender.
‘Why not?’ asks the number 12 angrily.
‘You’re under 18,’ replies the bartender
 
Twitter
Steve
‏@behindallbars
The number 16 walks into a bar…bartender says “I can’t serve you”...number 16 says..“How come?’ ..bartender..“You’re under 21” #bartending
4:22 PM - 14 Sep 2010
 
Google Groups: Angelique’sSmorgaabord
Number 12 A number twelve walks into a bar and asks the barman for a pint of beer. “Sorry I can’t serve you,” states the barman. “Why not?!” asks the number twelve with anger showing in its voice. “You’re under 18,” replies the barman. Print | Commen
andrea
5/31/12
Number 12
A number twelve walks into a bar and asks the barman for a pint of beer.
“Sorry I can’t serve you,” states the barman.
“Why not?!” asks the number twelve with anger showing in its voice.
“You’re under 18,” replies the barman.