

The crew do work long hours. A 70 hrs a week minimum contract is the norm, but overtime is expected when necessary or available.
"Most" Crew on the classic's live on Deck A or B (the ones under Deck 1).
A small amount of those cabins (not Staterooms!

) have portholes for Officer status CM's.
A few Crew that are Officers get Deck 1 Starboard cabins, and there are a few Crew Cabins in the Forward part of Deck 2 past the Guest Staterooms.
The really high up Officers like the Cruise Director, Hotel Director, Captain etc have Staterooms (not Cabins!

) on Guest Decks.
The Crew have an Officer's Mess, and a Crew Mess on Deck 1 Aft, along with a Officers Bar and a Crew Bar (Classics).
They also have a Crew Gym, Library and on the Classic's, they have Deck 5 forward at the bow of the ship.
There is a small town below decks, sleeping, eating, relaxing and having a great time when off stage!
Have a look at the
DCL job site for some info you might find interesting:
http://dcljobs.com/shipboard-life/accommodations
Ex Techie