I made plans to travel in J class with an overnight layover in MAD. I wonder if anyone has experienced the new One World VIP lounges there. Specifically I saw that "Sala Velazquez" is open 24 hours a day, and has "Relaxation Rooms", showers, and all the usual good stuff. Are those relaxation rooms intended to let passengers crash there for a few hours? I don't expect it would be comfortable enough or appropriate to use the lounge as a hotel room for the whole night, but would still love to hear any first-hand experiences what it's like there. Thanks!