I often take buffet trays of breafast back to the cabin
to enjoy hot breakfast on the balcony.
We have also taken dinner from the dining room "to-go" for members of our party that were ill.
Once we were at the midnight buffet, and there was a very poor turn out (the ship was half full due to hurricane Wilma), we complimented one of the beautiful cakes they had on display. The young lady serving the cakes offered us the whole thing...she said no one would eat it anyway and there were more yet to put out.
She let us take the whole cake back to our room.
It was fantastic. Of course I wouldn't expect that normally 8).