“A guy walks into a bar...” is a typical form of what has been called the “bar joke.” One of the oldest and most popular of bar jokes is:

“A termite walks into a bar and asks, ‘Is the bar tender here?’”

The joke has been cited in print since the 1990s.

“What does a termite order at the restaurant?"/"A table for two!” is another termite joke.


Google Books
U.S. News & World Report
Volume 115, Issues 17-25
1993
Pg. 109:
Recent example: “A termite walks into a bar and says: ‘Is the bar tender here?’”

Yucks Digest
Date: Tue, 29 Sep 98 19:35:46 -0700
From: Peter Langston Subject: Bar Jokes
To:
(...)
(14) A termite walks into a bar and says, “Is the bar tender here?”

4 January 1999, Sacramento (CA) Bee, “Top of the page: Humor,” pg. D2:
A termite walks into a bar and says, “Is the bar tender here?”

A Prairie Home Companion (NPR show)
A Prairie Home Companion - Jokes 1999
April 7, 1999
(...)
A termite walks into a bar and asks for the bar tender.
Marian Thorpe,Age: 17

Google Books
A Guy Goes into a Bar:
A Joe King Book
By Al Tapper and Peter Press
Kansas City, MO: Andrews McMeel Universal Company
2000
Pg. 28:
A termite walks into a bar and says, “ls the bar tender here?”

Google Books
A Guy Walks Into A Bar...:
501 Bar Jokes, Stories, Anecdotes, Quips, Quotes, Riddles and Wisecracks
By Michael Lewis
New York, NY: Black Dog & Leventhal Publishers, Inc.
2005
Pg. 76:
A termite walks into a bar and asks, Where s the bar tender?

Twitter
Tom Cahillane
‏@dmcscorp
A termite walks into a bar and asks, “Is the bar tender here?”
http://www.alcoholichumor.com
1:25 PM - 4 Mar 09

Twitter
Tanner Eldredge
‏@TannerEldredge
So a termite walks into a bar and says “Is the bar “tender” here?” Hahahah
9:09 PM - 4 Nov 13