Couples check in, but what if only one person has an ID card?

Generally, hotels only need an ID number or ID card to check in. If it is a standard or high-end hotel. You can let people with ID cards register in the standard room. A party without an ID card can wait outside to make a phone call. Just walk into the hotel and say you're looking for someone. Usually no one asks. You can just walk into the room opened by your girlfriend or boyfriend. It is best to open a big bed room. That's all. It is difficult to type by hand. I hope to adopt.