Summer is almost upon us which means that it’s time to start cataloguing all of Madrid City’s pools and rating our chances of getting into each one. Gone are the days of building rooftops only being used for television antennas. Many hotels in Madrid have decided to convert these spaces into paradises for guests. Unfortunately, the places on this list of Madrid City’s swankiest hotel pools are, for the most, part, not open to the public (although a couple are). But they can be enjoyed by travelers with a few hundred dollars per night to blow on lodging. If you…