Any recommendations for a 3 or 4 night stay in Madrid, first time visitor. Thinking central or a neighbouring central area. Will be late May and I have noticed some hotels have rooftop small pool and deck areas which might be nice for a bit of relaxing late afternoon after lots of walking and sightseeing, however I think some of them you can buy a day pass to visit? Ideally modern, clean, for a solo female. Budget around 150 per night although could stretch for something with great recommendations