basschick has pointed out some very good things. Sometimes I rent the room for a few hours only during the day and I can get special rates. Usually I tell them that we are doing some interviews for a movie or commercial production with amateur actors. And I let them show me different rooms as well, so I can choose one at the end of a floor and one where it is no problem if you can see flash lights from outside. A small tip for the person behind the desk is always quite helpful to thank them for the extra efforts to find me the right room.