Top 4 in Top 10 leading rules in Western high-end cuisine.
There will normally be a seat plan near the dining room door, or a card on the table. If not existed, wait to be seated by your coworker. There are strict rules about who sits at the table and will be extremely embarrassed if you have to ask for a move, for both you and the landlord.
The landlord sits at the top of the table (this is usually a seat away from the entrance or chaos. To the right he is the wife of the honorary guest and to the left he is the next wife of the gentleman in order of importance. Female attendees will have honorary guests on the right side and the second important gentleman on the left.
The rest of the seat plan is usually arbitrary but will always be replaced based on gender. When you sit on the table, your feet must be firmly placed on the floor in front of you. Do not cross the legs, do not rely on the seat and do not shake legs. Your elbow should be at your side at all times. Sit upright and don't tilt people when you're eating; Put your food into your mouth.
In Britain, proper behaviour is holding your hands on the thigh when you are not using them. In France, the rule is always keep your hands on the table. You can put them on the side of the table but you never put your elbow on the table