This is one of those episodes which show how much the work environment has changed (for the better). Frist, that hosting the boss for dinner was a big deal showing status and acceptance. Second, that she took his bundle of dirty shirts as a favor might back then be seen as kindness, but now appears to be so subservient as if she was a doormat. Today, you'd expect the act of kindness to be giving him the name of a dry cleaner. Third, the conversation among the guys in Mary's presence at the bar was cringeworthy despite Murray and Gordi being otherwise good people.
If that premise was to be written now then Mary, Murray and Gordi would have immediately told Lou he was wrong and ask him how long before he'd admit he was wrong.
The show has a continuity error as it is after an episode of the crew having dinner at Murray's, but has dialogue of Mary not knowing that Lou and his wife have had dinner at Murray's.