The best scene is Mabel preparing and serving dinner to all of Nick's fellow workers. We see how she deals with human situations, we see Nick's discomfort of his wife's over-playfulness (in his opinion). His shut-down of her is brutal--her response is heartbreaking. The way this scene ends is touching.
The problem is Cassavetes adds too many unnecessary scenes. It drags on with added characters that didn't need to be added. Gena and Pete are great in this, so the movie should be more focused on them.