Can a triple room accommodate four people?

Of course. It is ok for four people to live in a triple room, but it must be agreed. There should be something special about living in a triple room or a quadruple room, such as a hotel or dormitory. If it is a hotel, it is generally not allowed to stay in a triple room for four people, but if the room is relatively large, an extra bed can be added, and it is also possible to charge a certain extra bed fee.