Go to Moe’s, Pei Wei, or some other fast casual restaurant when it’s really busy. Find an open table and park your family there while one person orders. Get your forks, napkins and drinks ready on the table in preparation for the food. If another family comes along with a tray full of food and there are no open tables, simply say you were here first even if you don’t have your food. If they refuse to move, sit on the floor and begin eating at their feet like beggar outside the kings gate.
I know you think you are being efficient, but it’s rude to skip line like a bully in the elementary school cafeteria. You know, the kid who steals an extra chocolate milk and eats off everyone’s tray even though he has government coupons for a free lunch.