Flavia's place is wonderful! There were beds for everyone (we had a group of 18) and all the things you need to make your stay easy. The location cannot be beat (although Madrid is noisy all night long - so you might want to get a white noise app on your phone if you want to sleep), and Flavia was so very helpful. We asked her so many questions about restaurants, etc and she was quick to respond and it made our trip even better. I would certainly recommend to anyone visiting Madrid with a large group.