The Ship's Officers wardroom & cabins, almost the stern-most section on the messdeck. It looks like there are facilities for around a dozen officers. The next sections forward of this would be the cabins for the warrant officers [such as the sailmaker, carpenter etc]. Then on the mess deck itself would be the marines and forward of that, the ordinary seamen & ships boys (who would all sleep in hammocks).

Rank definitely hath it's privileges !