Excuse me, is there a deposit for booking a private room in the restaurant?

Whether to pay a deposit when booking a private room in a restaurant can be agreed by both parties; The function of the deposit is to ensure the performance of the contract and prevent either party from defaulting. If the customer booked a private room but didn't go to eat, the deposit would not be refunded; If the restaurant can't provide the reserved private room by then, it should double the deposit to the customer.