It is called "All Hands On Deck," and the quality varies A LOT even on the same cruise. Also, it has gone downhill over the years.
It consists of an assortment of 3-4 cheeses, some crackers (range from saltines to Club Crackers to some really nice ones), and there used to be a little bit of fruit (grapes or sliced apple) and a little cup of nuts. Most recently we haven't seen the fruit or the nuts. If you have a preference as to type of cheese, you can ask for it...trying to communicate the kind of crackers you'd like is a lot less successful.
This is a room service item.