>>Here, at the end of the meal the server usually says, "Can I bring you anything else?" I'm tempted to reply, "No, absolutely nothing". Then, when she brings the bill, I would say, "But you said you weren't going to bring me anything else!".
>
>I managed to confuse a few people in the US by spreading my hands wide, like a bragging angler, while saying "so long" on departure.

I'm sure they (the minimum wage serving staff) admired you all for turning normal social pleasantries into some sort of sarcastic linguistic exercise