Re: CO upgrade- yes, we have done it twice. Once on RDam, once on KDam. Had 1155 on R, 1145 on K. Of course, they have to be available at the time.
The gray area I believe is the galley. We booked starboard for both. At the end of the hallway by the aft elevators on starboard, there is a crew entrance stairwell, but no noise from that.