I was in the six item express lane at the store quietly fuming. Completely ignoring the sign, the woman ahead of me had slipped into the check-out line pushing a cart piled high with groceries. Imagine my delight when the cashier beckoned the woman to come forward looked into the cart and asked sweetly, "So which six items would you like to buy? Wouldn't it be great if that happened more often?
Put them all on the band, in groups of 6, separated by one of those thingies, pay for each group of six! Wouldn't that cause a few tuts and dirty looks.
Yeah if they go to the back of the queue each time for each lot of six then fine. But you can't save a space behind you (or in front of you) to go again.