You have no right to even pose such a question.
Hostels offer a wide range of different room configurations to accommodate their guests. There is a wide range of possibilities accessible, from a private room to a shared room with a few or many people, depending on your preference.
They were staying with a large group of friends in a hostel, and one of the rooms had an extra bed that they could use. Before anyone else could enter, the individual who arrived first grabbed the key to the room, closed and locked the door, and put on a pair of headphones with active noise cancellation. They were forced to yell at the girl and pound on the door for close to an hour before she eventually paid attention to them.