Well they have to talk to call orders to each other, but yeah they don't actually have to interact more than strictly necessary.

Chuck's at ease behind the counter, mixing drinks and almost being amiable with the customers.

Unless they're rude fuckers. Then Chuck gives them exactly what they deserve.
He hasn't made anyone cry yet, but it's early yet.

He's also watching Raleigh whenever he's not looking. When he is--if he ever looks back at Chuck--he's looking away.