is it an cabin
A private room on a ship is a cabin.
CABIN
It's called the engine room.
a cabin
mess room
Crew lounge, ship lounge, t.v. lounge.
Stay in the private dining room with a good looking blonde while the ship runs aground... (see Costa Concordia)
Wireless room or wireless "shack" in ship's parlance; sometimes called the "Marconi Room" after the inventor of wireless communication.
Quarters if its a place to sleep or a cabin. The kitchen is called a galley.
Some are called rooms - Engine Room, Chart Room. Some are compartments - Sleeping Compartment Some are called cabins - Captain's Cabin But a lot are just called "spaces" - Office Space
Traditionally, cabin, however modern cruise ships rooms are called staterooms.
On military vessels the room where the officers met and ate their meals is called the Ward Room.