If you are staying in a hotel with double rooms and two beds and friends come to live together, will the boss charge extra?

First of all, I am an undergraduate studying tourism hotel management.

According to the hotel's regulations, a double room is a standard room, which needs two people. If a guest has a child who is only a few years old, he can live with an adult for free, but if three people want to live in a standard room, the third person must pay for an extra bed, that is, an extra bed for your room.

Of course, my basis is the knowledge explained by the hotel teacher. In fact, most hotel basic knowledge textbooks will be introduced from here.