KEY POINTS

Not every table will move through the dining experience at the same pace. Nor will each table want the same level of interaction. When can I start picking up on this?
When I first approach.

When I drop the appetizer, this is another good opportunity to assess my table. What am I paying attention to in regards to how to proceed?
If they're engaged in conversation, If they haven't touched the menu, If they look attentive with menu put down and looking around for me.