What do the waitresses in star-rated hotels mainly do? Is it formal?

There are many kinds of waiters. For example, the waitresses at the front desk are generally cashiers and receptionists, the waitresses in the housekeeping department are cleaning rooms and delivering goods to guests, and the waitresses in the catering department are generally greeting guests for dinner. Hotel employees are usually frequent visitors. Unless the hotel has a KTV, there will be a princess ordering songs or something, and there may be other services, but those people generally do not work in the hotel.