Warrant officers generally mess in the wardroom with commissioned officers.
From the en.wikipedia.org
There was turkey in the mess hall, a new movie nightly in the wardroom.
From the time.com
The men slept in the wardroom at the east end and dined in the messdeck at the west end.
From the nzherald.co.nz
The wardroom was dominated by a large table and spindle-backed chairs.
From the nzherald.co.nz
Adm. Mullins and Capt. Honors don't strike me as a pair that might pal around together in the wardroom.
From the ocregister.com
He worked his way aft and climbed out of the wardroom on the captain's ladder and up onto the deck.
From the en.wikipedia.org
Gus always kept five dollars in nickels so he could buy everybody cokes in the wardroom after evening general quarters.
From the time.com
He and Commander C. L. Freeman are in the wardroom.
From the en.wikipedia.org
More examples
Military quarters for dining and recreation for officers of a warship (except the captain)
The wardroom is the mess-cabin of naval commissioned officers above the rank of sub-lieutenant. The term the wardroom is also used to refer to (metonymically) those individuals with the right to occupy that wardroom, meaning "the officers of the wardroom". ...
The Wardroom originally was known as the Wardrobe Room, a place where officers kept their spare wearing apparel. It was also the space where any loot secured from enemy ships, was stored. ...
A space in which the commissioned officers, and some warrant officers, berthed and messed.