This is actually a funny story..
My ex-husband and I took a cruise in 02 to the Bahamas. He had never been, so we booked a guaranteed cabin. Our TA told us that we had rec'd an upgrade, but it wasn't stated as to what kind. I assumed it was a balcony or a window at least.
So we get on the Carnival Fantasy around Xmas time and we get to our cabin..and I prepare him for a fabulous room, with a view and all. We open the door and I see a curtain, by the wall. I tell him to watch out, I'll open the curtain to expose a window....well lo and behold, it was a damn wall. I was mortified, but found it hilarious.
Another cruise I took with my mom and aunt, we were upgraded to a lovely little balcony. It was nice.