Our condo has a small area at the front of the living room that is not exactly part of the living room, but neither is it a separate room.  The floor plans referred to it as a den.  I suppose with an open floor plan, you can call any area anything you want; but I get a kick out of showing guests “the den”.

This was a 30-minute sketch: 4B pencil in my sketchbook.  Just trying to capture the light/shadow from the lamp.