How to surprise hotel guests on their birthdays?

Hehe, when he (she) has a meal, especially when he (she) has a meal with a group of friends, the manager or head waiter will line up and slowly put the birthday cake in the trolley, which will definitely surprise the guests, because someone in a foreign land knows his (her) birthday, and it is also a kind of smell to celebrate it for himself. This will make the guests feel at home and greatly enhance the reputation of the hotel. If there is no chance to eat it, sending it to its room can achieve the same effect.