I read the new lounge has "resting rooms." Does anyone know about them and do they need to be reserved or is it a first-come-first-served thing? Any time limit? Is it a private room? I have a 13-hour layover with an early morning arrival in MAD and I'd love a few hours nap and a shower before I head into the city for a nice lunch and some sightseeing. (I'm flying MIA-MAD-JNB in business.)