Madridman,

Although "cama matrimonial" can be gramatically correct in Spanish, we don't use it (at least in Spain). So, if you want to make a reservation in a hotel/hostal in Spain do say "cama de matrimonio".

BTW, Sofía, I would say "zumo de naranja" and "estantería de libros". "zumo" is far more used in Spain than "jugo".