I don't know how many Starbucks there are in Madrid, but I'm guessing around 50 or so. I walked into the one in the photo yesterday (not 100% sure the address is correct), looked at the menu and the prices and walked straight out.
Don't get me wrong because I do like Starbucks but I honestly can no longer justify going into one in Madrid or any other place in Spain for that matter. The coffee here is excellent and a fraction of the price of Starbucks.
If you're traveling around Europe, try the local coffee if its just a cup of coffee or a cappuccino or a cafe latte that you want. When in Italy, Spain, Portugal and_______ (fill in the blank) - avoid Starbucks. (But don't tell anyone I said so!)