Briefing lounge
The briefing lounge aboard the Enterprise
A briefing lounge was an area of Federation starships where officers could relax while off duty. It was equipped with a monitor through which one could watch the view from the viewscreen or communicate visually with the bridge.
In 2265, James T. Kirk and Spock were playing a game of three-dimensional chess in the briefing lounge of the Constitution-class USS Enterprise when Kirk was interrupted by a call from Lieutenant Lee Kelso, informing them that an unknown object the Enterprise had been tracking was now within tractor beam range. (TOS: "Where No Man Has Gone Before")
The script of "Where No Man Has Gone Before" specifies that this room was to be a redress of the briefing room.