Checkout

No one ever pays any attention to the light. Go ahead and turn your light off, it won't make any difference, because if there is a clerk scanning groceries, people are going to line up.

What does this tell you? It tells me you should keep that checkout lane open, and it tells you the same thing.

So, take your smoke break after the rush is over- or better yet, skip the smoke break and bring some carts in from the parking lot.