“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A popular science joke is:
   
“A room-temperature superconductor walks into a bar. The bartender says, ‘We don’t serve any superconductors around here.’ The room-temperature superconductor walks out without putting up any resistance.”
 
Brian Malow, self-proclaimed as “Earth’s Premier Science Comedian,” popularized the joke in videos from December 2008 and November 2009.
 
“Yttrium barium copper oxide (YBCO) walks into a bar…” is another version of the joke.
 
         
YouTube
Brian Malow: Science Laughs
Wonderfest Science
Uploaded on Dec 18, 2008
Brian Malow makes us laugh at Science Laughs, Bay Area Science Expo, Wonderfest 2008
http://sciencecomedian.com/
6:48
“A room temperature superconductor walks into a bar. The bartender says, ‘We don’t serve any superconductors in this bar.’ The room temperature superconductor leaves without putting up any resistance.”
 
Walks Into A Bar Jokes
TUESDAY, MARCH 17, 2009
POSTED BY DOMENIC MAMMARELLA AT 3:45 PM
(...)
A room-temperature superconductor walks into a bar and the bartender says “we don’t serve any superconductors around here” at which point the room-temperature superconductor walks out without putting up any resistance.
 
YouTube
‘A Virus Walks Into a Bar…’ and Other Science Jokes - Brian Malow
ForaTv
Uploaded on Nov 20, 2009
Complete video at: http://fora.tv/2009/11/08/Science_Lau...
Science comedian Brian Malow jokes that a virus is “the ultimate David and Goliath” when compared with humans. He then rattles off a series of science-related jokes. “Schrodinger’s cat walks into a bar, and doesn’t.”
1:50
“A room temperature superconductor walks into a bar. The bartender says, ‘We don’t serve any superconductors in this bar.’ The room temperature superconductor leaves without putting up any resistance.”
 
Twitter     
dpkonofa
‏@dpkonofa
Or this one:  A room temp superconductor walks into a bar.  The bartender says we don’t serve SCs.  The RTS leaves with no resistence… lol
6:51 PM - 20 Nov 2009
 
Google Groups: alt.dreams.castaneda
more science jokes
thang ornerythinchus
9/22/11
(...)
A room temperature superconductor walks into a bar. The bartender says, “Get out! There are no superconductors allowed in this bar.” The room temperature superconductor leaves without putting up any resistance.
     
Daily Joke
Thursday, November 10, 2011
A superconductor walks into a bar…
the bartender says, “we don’t serve your kind here.”
The superconductor leaves without any resistance.
 
Half Moon Bay (CA) Review
Raising the bar on jokes
Posted: Wednesday, December 7, 2011 1:02 pm
Louie Castoria
(...)
A superconductor walks into a bar. The bartender says “We don’t serve superconductors here.” The superconductor leaves without putting up any resistance.
 
YouTube
A Superconductor Walks Into a Bar
ForaTv
Published on Nov 22, 2013
Full video from Wonderfest available at: http://fora.tv/2009/11/08/Science_Lau...
Brian Malow performs science comedy at Wonderfest 2009.
 
BuzzFeed
The 24 Greatest, Nerdiest Jokes Ever Told
Supercollider? I hardly even know her!
posted on Jun. 16, 2014, at 4:25 p.m.
Tanner Greenring
(...)
5. A superconductor walks into a bar and orders a beer.
THE BARTENDER TELLS HIM TO LEAVE.
THE SUPERCONDUCTOR PUTS UP NO RESISTANCE.