"Where are You From?" joke

A man stumbles up to the only other patron in the bar and asks if he could buy him a drink.
"Why 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."
"Of course," replies the second man, and they both pour back their drinks.
Curios, the first man then asks, "Where in Ireland are you from?"
"Dublin," comes the reply.
"I can't believe it says the first man. "I'm from Dublin too! Let's have another drink to Dublin!" The men both continue drinking.
Curiosity strikes again and the first man asks, "What school did you go to?"
"St. Mary's," replied the second man. "I graduated in' 62."
"This is unbelievable," the first man says. "I went to St. Mary's and I graduated in' 62, too!"
About that time, in comes one of the regulars and sits down at the bar. "What's been going on?" he asks the bartender.
"Nothing much," replies the bartender. "The O'Mally twins are drunk again."