A good point by 2B. The owner of a couple of McDonalds up our way decided to keep all the condiments behind the counter - if you want anything, ask for it or, most generally, the staff will ask you how many whatevers you'd like. He was amazed at the amount of ketchup packets going out the door when they'd leave a whole container of them sitting out! He said he personally watched people stuffing their pockets with them. It made an amazing difference to his bottom line when he put them behind the counter.
Bill
