“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A cable TV installer version is:
 
“A cable TV installer walks into a bar and orders a beer. The bartender says, ‘You’ll be served sometime between 7 and 2.’”
 
That is, the bartender offers service just like a cable TV installer. The joke was posted on Twitter by ChicagoScott on March 6, 2012.
   
   
Twitter
ChicagoScott
@Chi_TownScott
A cable TV installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7 and 2.”
12:06 AM · Mar 6, 2012·TweetDeck
   
Twitter
Steve
@behindallbars
A Cable TV installer walks into a bar and orders a #beer .... the bartender says “You’ll be served between 1 and 5”    #bartending
8:12 AM · Apr 30, 2012·TweetDeck
   
Twitter
Raul Gonzalez
@bumb185
A cable TV installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7 and 2.”
7:41 PM · May 25, 2012·Twitter Web Client
   
Twitter
MixEmUp Bar10 School
@MixEmUpBar10
A cable TV installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7 and 2.”
8:41 PM · Jun 25, 2012·Facebook
 
Facebook
BKInspired
November 8, 2012 ·
A Joke for Thursday: A cable TV installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7am and 2pm.”
   
Facebook
Sulinda Ann Dukes Morin
May 3, 2013 ·
This stupid joke comes to mind, because it is perfect for our cable company….A cable installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7am and 2pm”
   
Twitter
MacCocktail
@MacCocktail
A cable TV installer walks into a bar and orders a beer.
The bartender says:  “You’ll be served sometime between 7am & 2pm.”
6:11 PM · Nov 15, 2013·Twitter Web Client
   
Twitter
Jonathan pine
@pine_johnny
A cable TV installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7am and 2pm.”
8:45 AM · Sep 10, 2015·Twitter for Android
   
Twitter
Painful Puns
@PainfulPunz
Replying to @LadyBlackTear
A cable TV installer walks into a bar and orders a beer. The bartender says, “You’ll be served sometime between 7 and 2.”
4:25 AM · Oct 29, 2017·Twitter Web Client
   
Twitter
SM
@swatimishra8
A cable guy walks into a bar and orders a beer.Bartender tells the cable guy that he will be served between 7pm and 1 am.#walksintoabar joke!
7:22 AM · Feb 21, 2018·Twitter for iPhone
 
Reddit—Dadjokes
Posted by u/BlankPhotos March 13, 2020
A cable TV installer walks into a bar and orders a beer.
The bartender says, “You’ll be served sometime between 7am and 2pm.”