Inside the house, I consider living room as a public place within the people living in the house and for the guest of the house. Living room is also called sitting room or lounges, this is the place in the house where we talk with the guest, where we watch movies where we play loud music etc. Compare with the room, room is a private place in the house normally the owner of the room has his power to do anything he wants to do inside he can be noisy and messy inside.
Some op us are living in a shared room, normally room mates are two three or four people in one room and if you are not lucky the room has more than 5 people. Of course all of you has equal responsibility to respect each other. We canot be noisy if our room mates are sleeping, we can only do things inside the room if the one inside likes what you want to do, if he like loud music you can play loud music. but if he didn't like you can play loud music using your headset. You can ask him if its okay with him to play music etc etc.
Now once we go to living room it is not good that you sleep in the living room, once you stay and sleep in the living room its like you are depriving your room mates to have freedom to the the things they want to do in the living room, you are not in right place to sleep, if you want to sleep you can sleep in your bed in your shared room. remember that your living room is a place for everybody not only for you. You should be aware that once you sleep in the living room there is a big chance that you will be disturb anytime....