Why do we call burgers hamburgers when they are made of beef? Beefburgers, that's what they really are.
This may be just legend but my understanding is that ground beef was invented in Hamburg. I have no idea, however, where the round bun and lettuce first originated, Just shows how there are no statues to the really important people.
I don't think they would for very long. I think they might continue serving unpaid for a certain amount of time but for how long, I have no idea.