He starts at the Four Seasons, eating only an appetizer, downs his main course at '21', and finishes off with coffee and dessert at a third location. He believes the etiquette of the situation demands that you leave one table claiming only an appointment, not that you are lunching with yet another person. Which silverware he uses could tell a tale. Decide quickly on what you are going to order, and don't make the group wait for you. Remember, drink to the right and eat to the left, so you don't grab the client's bread.
Napkins go in the lap, nowhere else.
Knives and forks go back on the plate as soon as you have taken a bite and remain there until the next bite. Don't lick your fingers or brush crumbs off the table with your hands. Stick to a pre-determined limit on the amount of alcohol you will drink.