JFK Airport, New York City.
Airplane passengers are waiting for their flight to Pittsburgh. A 20-something girl walks up to gate, sits on the floor with her bags and eats pizza:

Yinzer Man: [gesturing to an empty seat next to him] You can sit right here, if you want.
Girl: [shakes head] That’s okay, I’m fine.
Yinzer Wife: It’s OK; we don’t bite!
Girl: [shakes head again and keeps eating]
Man: [to Yinzer Man] Hey, can I sit here?
Yinzer Man: [glaring at Girl] Sure you can: SHE doesn’t want it!