I Like a Good Joke

This woman walks into a library and straight to the main desk.
The librarian asks her: "yes, can I help you?"
The woman immediately replies: "I'll have one hamburger, medium fries and one small soda please."
The confused librarian tells this woman: "excuse me ms, but you've walked into a library."
The woman says, "oh I'm sorry", and whispers "I'll have one hamburger, medium fries and one small soda please."