When I booked, I put 2 adults and a child, but upon arrival, found only 2 single beds with no room for another. they had the reservation, and it did state 3 persons in it, but they "explained" that these are their rooms for 3 persons (although I saw other rooms when they were open for cleaning, which had more beds and space).
Would they put a small expandable bed, they would charge more (and then nobody can move in the room because a lack of space).