"Some Very Common Traits In Two Drunks" joke

A man stumbles up to the only other patron in a 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.
I’m curious, 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. ”
“Of course, ” replies the second man.
Curiosity again strikes and the first man asks: “What school did you go to? ”
“Saint Mary’s, ” replies the second man, “I graduated in ‘62. ”
“This is unbelievable! ”, the first man says. “I went to Saint 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’Kinly twins are drunk again. ”