Frankfurt is singing itself up to take over from Berlin as the coolest city in Germany, we are told. At its heart is the red-light district, Bahnhofsviertel, where clubs and restaurants have been thriving. The area has resisted gentrification, but many have visited, some staying at the modern Bristol Hotel, started 15 years ago by Mickey Rosen, who says: “Even the conservative locals love to dive into a different world. It just took someone they trusted to invite them to the area.”
