"So there you were, right, sleeping in all your separate rooms in that inn they hastily built a few years ago, when word of the great tourney went about. But, now, here you are, dumped into some dank basement with your travelling companions. You see a heavy iron door before you and hear wild screams and terrifying growls. What manner of terrible place is this?"
(Imagine, if you will, a fantasy version of H.H. Holmes' murder castle, as that was my inspiration, but it could go a few different ways.)