"Reunion, The" joke

A man stumbles up to the only other patron in a bar and asks if he could buy him a drink. "Of course," comes the reply.
The first man then asks, "Where are you from?"
"I'm from Ireland," replies the second man.
The first man responds: "You don't say, I'm from Ireland too! Let's have another round to Ireland!"
Curious, the first asks: "Where in Ireland?"
"Dublin," comes the reply.
"I can't believe it, Me too! Lets have another round of drinks to Dublin!"
The second man can't help himself so he asks, "What school did you attend?"
"Saint Mary's", replies the first man. "I graduated in' 62."
"This is becoming unbelievable!!!" They say in union.
About that time, in comes one of the regulars and sits down at the bar.
"What's up?" he asks the bartender.
"Nothing much," replied the bartender...
"The O'Malley twins are drunk again!"