Why can't a hotel open three cards at the same time?

Because giving cards is not directly related to the number of people.

You must register your room card with your real name. A room card needs an ID card. Normal families, staying in hotels, all registered as adults. Couples can get two room cards. If you live in a suite, you can also ask for three rooms and pay a little more deposit, provided that you really recognize each other.

The cards commonly used in hotels mainly include hotel membership card, hotel room card, hotel IC card and hotel ID card, and the name and purpose of each card will be different. Hotel room card: brand-new white material, smooth and delicate outside the card, fine and tough workmanship, clear text, fast sensing, not easy to break, ensuring bright color of the room card, long-term use, no fading, no peeling.