How can a boyfriend ask the front desk room number when he opens a room with another woman?

If you forget which room it is after opening the room, you can show your ID card to the front desk. The waiter will swipe your ID card on the computer machine, and you will find the corresponding room number, so you will ask the room number. Generally, the room floor number will be displayed on the room card. If you are looking for someone else's room number without an ID card or other proof, it is estimated that the front desk will not provide you with guest information.