Many thanks for the HL!
Indeed, Madrid has a brilliant night (and day!) life. It is full of warm-hearted people who like to eat, drink and enjoy life in general. The HL picture is of the Chocolateria San-Gines, a small place hidden at the end of an alley that sells delicious chocolate cups and churros. In the daytime, it is full of families and groups of grandmas chatting. At night, it becomes the official post-drinking snack spot and is full of young partygoers (not that I visited the place several times...)