karenwishart,
When are you going to be in Madrid? I am spending 8 weeks in Spain with with my duaghter (12) and her 13 year old friend. We will only be in Madrid for 2 days at the begining of our trip and 2 days at the end (the rest of the summer we are at language school in La Herradura). We are planning on Casa Patas on Saturday June 23. Is that the day you are going and if so, what time did you make your reservation?