When you are at a resturant without a waiter that is really crowded, and you look for people that look almost done with their food and stay near their table until they leave, so you can get the table before other people.
When I was at 5 Guys, it was so crowded, I had to stalk tables, I even had everyone split up so we could get a table.
Man 1: Hey! You can't take that table! I was next in line!