One of the best things about this accidentally retro bar is how much fun it is to explore. There are secret, time-bending portals connecting the endless labyrinth of dining rooms… or so it seems. When the same short, middle-aged waiter in a waistcoat kept appearing every time we entered a new room, we wondered how else he could have got there so quickly.

Have you ever been walking along the street in Madrid and thought to yourself: ‘Quick caña and tortilla?’ Me too. If you happen to have that thought whilst on Calle de Fuencarral, you’re seconds away from making it a reality. But if you’re half way across the city, jump on a metro – it’s worth the ride.