Good suggestion although I've YET to hear from anyone who's used www.VenAMiCasa.com . Plus, I'm not sure they have double rooms there. VenAMiCasa.com has rooms for rent in homes owned, usually, by families or singles who have extra space. I'd imagine this would be the closest thing to "real living" in Spain. And most of the rooms are CHEAP - starting at about 17 Euros per night and going up to, maybe, 30 Euros per night. They have rooms in Madrid, Barcelona, Granada, and many many other cities around Spain.

Saludos, MadridMan