Kaiten Sushi Ginza, Madrid

This restaurant's motto is "sushi for health and beauty". Other European capitals already have branches of this Japanese fast-food/self-service experience. The downstairs area allows you to pick your own sushi dishes from a moving conveyor belt and the total amount is added to your final bill. You can sit down and take your time upstairs in the simple, well-lit space and try other typical Japanese dishes, like tempura, seaweed and octopus. Proximity to the major law courts means you're more than likely to eat with famous politicians and journalists.