I had a feeling it might be a re-cycled number. Speaking of Irishmen, what about this one;
An Irishman walks into a Library and says to the desk clerk,
"Can I have a hamburger please."
Desk clerk: "I'm sorry sir, this is a library."
Irishman, now whispering, "Oh, I'm sorry, could I have a hamburger please."
I'm allowed to tell such jokes - I'm of Irish descent (and blond!)
If a Swiss or German were telling the same joke it would probably be "an Austrian walks into a library... etc".