It's called the engine room.
a cabin
mess room
is it an cabin
Crew lounge, ship lounge, t.v. lounge.
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
On military vessels the room where the officers met and ate their meals is called the Ward Room.
Traditionally, cabin, however modern cruise ships rooms are called staterooms.
The safest place on a ship during a tornado (or waterspout as they are called on a body of water) would be an interior room in the ship away from windows.
A private room on a ship is a cabin.