What is the nature of the discussion between Antipholus of Ephesus and Balthazar in Act 3, Scene 1?

In Act 3, Scene 1, Antipholus of Ephesus tries to cheer up Balthazar with banter, but Balthazar is in a bad mood. Then, Balthazar tells Antipholus that the very invitation into his home is more pleasing than the prospect of good food.