While the above link does have a complete listing of hostels participating in the association, they don't lend much information other than provide links to the establishments of participating members of the association which have websites (you can find these and more on the Madrid Hostels page ).

You'll also find thousands of previously posted reviews and recommendations right here in this forum category. Use the SEARCH link located at the top/right of every page and, of course, indicate the city which you're searching and the type of lodging you prefer. Good luck and have fun!

Also, regarding the flamenco "shout out", feel free to post this "Call for a Flamenco Outing in Madrid!" in the "Classifieds & Personals" forum category. Be sure to include the city location in the subject line of your thread. I wouldn't mind getting in on that myself!

Saludos, MadridMan