Can anyone tell me what hotel(s) are used in Madrid for the 8 days in Barcelona and Madrid tour?
The hotels vary from tour to tour. You can call the RS office and get a definitive answer if you are signed up for one of the tours. Or you can search the RS scrapbook archives to find names of hotels used on previous tours.
https://www.ricksteves.com/tours/scrapbooks/tour-alum-scrapbooks
Our tour stayed at H10 Villa de la Reina in 2022. It was very nice with a cosmopolitan, big city feel and an inviting lobby bar. It's very convenient for the sites the tour visits, but part of the big-city feel is that it's right in the heart of the downtown tourist zone so it was wall-to-wall crowds most of the time. But we enjoyed it.