best old hal roach joke in history

This guy goes into the Boston Barbershop Company a newly established network of salons in Ireland.

He says: "One haircut please."

The barber says: "I'm sorry sir, we don't do haircuts here."

The guy says: "Okay give me a shave."

The barber tells him: "I'm sorry sir, we don't do shaves here."

And the guy says: "How about a hairwash?"

The barber replies: "We don't do hairwashes here either, sir."

The guy says: "Well what do you do?"

The barber answers: "We're fronting for the IRA."

And the guy says: "Oh."