my wife and I sailed out of new orleans two years ago and will be sailing again in may on the glory we were in a quad on the riviera deck, no robe in the room but my wife asked our steward and there was one there for her shower that night when we returnrd to our room, she wore it the rest of the cruise and loved it so much she purchased it for 25 bucks the last day, dont be afraid to ask your steward will get you anything he can, just remember to tip him. have a blast
We had an inside cabin on the Conquest last year and we had robes. They were folded on a shelf in the armoire but we never used them. Our group had seven other inside cabins and they all had robes. I guess each ship must have a different robe policy.