The customer wants to sample a sample of expensive food, before deciding to order it.
Adult demands for dishes intended for children, because young people's meals are usually cheaper, and here the waiter may enter into a long debate to convince the customer that this is in violation of the restaurant’s policy, and that the person’s age should be confirmed before serving whatever he wants to eat from the children's meals.
When they leave a tissue paper or wet behind a box of sugar or salt, while "proper behavior" is to put them in one of the dishes after eating.
The customer sits far from the dining table.
The presence of a large delegation to the restaurant without prior reservation.
People change their seating chairs continuously so that they find it difficult to serve dishes to everyone based on their memory.
A separate bill for each person, despite sitting at the same table.
Customers are chatting as they care to order what they want to eat.
Bring the customer to his laptop and use it on the table.
Olives who order things that are not on the menu despite their variety.