There's a lot of Philly Cheesesteak places around LA, which serves as an ever constant reminder that people don't know their Pennsylvanian geography! They never know that Pittsburgh and Philadelphia are on opposite sides of the state, or that the latter is from the other side of PA...
I met a successful sales rep last week who is orginally from Conn. He took a job in Pittsburgh without ever visiting and thought, "That's close to Philly, right?"