It is a very versitile expression as traditionally this room is thatched and it is usuallly in a secluded area away from technology and distraction.
Recent studies have shown that naked huts can be anywhere as long as there is a roof and walls.
The only real thing to remember with this expression is that the room has to belong to you or the person you are sleeping with ei a hotel room is not a naked hut unless of course you live there
Girl: Just sitting at home
Boy: oooh the naked hut