Photo: Wikimedia CommonsPart of the Autograph Collection, Roomers is the glamorous design hotel of Frankfurt in the buzzing Bahnhofsviertel, all moody lighting, velvet and a see-and-be-seen bar that draws a stylish local crowd. Rooms are sleek and sensual, and the spa is a genuine draw. It puts you a short walk from the banking towers and the nightlife. Head to the bar for a cocktail before dinner, and book a spa slot to unwind.