"One of them, anyway," Verity agreed, first twist the knob, then pulling out her wand for a quick "alohamora."
Inside was... Verity was wasn't sure what to call it, exactly. A lecture hall, she supposed. Or an auditorium. It was a large room, anyway, with rows of bench seats and a stage in the front. She stepped up onto the stage carefully, her shoes leaving marks in the dust. "If we squished in close, I bet you could fit everyone in here," she remarked, impressed. "Why is this closed?"