The Two Extra Seats
That is all it takes.
People do not look at us.
The private floor at that restaurant is up a set of stairs from the main dining room.
At the top there is a landing about fifteen feet square with a coat rail and two restrooms, and the double doors into the private room are on one side, and on the other side is the service pantry, which is a narrow room with a plating counter, a warmer, a dish drop and a pass-through window that faces the landing.
You cannot see into the pantry from the landing unless you deliberately look through the pass at an angle.