"Or there's the Prefects bath or ..." Hermione lowered her voice enough that just the two of them could hear. "The Chamber? It might take a while to get this sorted and we don't want to be watching the map the whole time..." Though she didn't want to think about going down there, really.
"Malfoy's probably in his dorm by now. We could try the Room of Requirement." Though she was leery of that too, since now the Slytherins knew where it was.