"There is no rule against students sitting at the tables of different houses," she snapped, "and even if there were, it is not for you to police. Twenty points from Gryffindor," Dale let out a sound of outrage, "for harassing another student - you are of age now, Mister Dale. It may surprise you to hear that there are no schoolhouses outside of Hogwarts," she said tartly, "Now return to your seat!" Dale shot them a nasty look, before reluctantly doing as he was told. With his and the Transfiguration Professor’s departure, Harry waited a moment, chewing on his treacle tart, before prompting Draco to speak.