Dormero Hotel Bonn · Windhagen Stylish. Idyllic. Convertible. We believe that an unusual hotel should bring to perfection what is essential in order to create personal free spaces for imagination: a fantastic bed, free movies, free minibar and free Internet, professional workout devices and an invigorating breakfast. Easy check-in and quick check-out. Flexible and sprightly members of staff. The sophisticated bar. The straightforward restaurant.