At the Grand Californian, some of the rooms with two queen beds have the bunk beds (big enough for a medium size adult) and a pull-out trundle bed under the bunk beds. So in those rooms, you could theoretically sleep 7. Some of the rooms with 2 queen beds only have a fold-out couch, and the same with the King bedrooms. You make a request at booking, and they'll do your best to accomodate.
We had requested 1 king and the bunkbeds, but when we arrived, they said they didn't have one. I'd made the reservation nearly a year in advance...but, what are you going to do? At the last minute, the CM checked again, and found us that type of room. We loved it!