This informant grew up in San Diego, CA.  He is a freshman business student at USC.  I asked him to tell me his best folk joke he had and this is the first one he thought of.

One day an Irishman walks into a bar and orders two pints of Guinness.  The bartender denies the man, explaining that he only serves one drink per person at a time. 

The Irishman replies, “The second drink isn’t for me, it’s for my brother.  See, we both grew up on our family farm in Ireland and every day we used to hit the local pub after work and get a pint together.  One day my father passed away and left us the farm, but eventually the farm could no longer support the both of us.  Being the younger son, I decided to move to America to try my hand at fame and riches.  But before I left we both promised each other to always continue drinking two pints at the local pub after work.” 

The bartender sympathizes with the Irishman’s story and pours him his two Guinness’s.  This goes on for a few weeks, until one day the Irishman comes in and only orders one drink. 

The barman says, “I don’t mean to intrude, but is your brother alright?” 

To which the Irishman replied, “O ya, he’s fine.  I just quit drinking.”

This joke is a variation of the ever popular “…walked into a bar” jokes.  It plays on the stereotype that Irish people love to drink.