We stopped by the Starbucks on Gran Via whilst in the city and needing a quick coffee fix. The frappuchino is as always a great choice when it gets hot in the hustle and bustle of the Madrid city centre. The cold brew is always a nice alternative of which is less of the sweet variety. Be sure to ask about the WiFi as they will give you a ticket at the till with a username and password to save you having to register. The toilets also need a code to enter that is on your receipt so don't bin it!