Geo has it right. If it is a full service restaurant and the waitstaff is packing up your orders, the server/bartender is taking time away from their seated customers to help you. And although packing up an order seems fast, every single second counts when you are waiting tables. There is a lot of multi tasking going on and we want to take care of all our guests dining in and and out to the best of our ability. I think everyone should work service industry once in their life to get perspective from the inside. Then maybe there would be (even) more understanding folks dining out