If you can believe the New York Times:
Portland, OR “A man is in the library and goes up to the desk. He asks for a burger and fries. The librarian says, ‘Sir this is a library.’ The man replies, ‘Oh, I’m sorry,’ and leans over and whispers, ‘Can I get a burger and fries?’
The NYC joke is based on an outdated characterization of New Yorkers:
New York, NY “I was at the library today. The guy at the desk was very rude. I said, ‘I’d like a card.’ He said, ‘You have to prove you’re a citizen of New York.’ So I stabbed him.”
Have a great weekend!