What is another meaning for choir (inspired by Amnesia the Dark Descent)?

I was playing Amnesia:the dark descent, and towards the end of the game i went into a series of rooms called the choir. I didn't see many groups of singing people. What does Choir mean with this background????What is another meaning for choir (inspired by Amnesia the Dark Descent)?
I haven't played the game, so I don't know what the rooms look like. Sometimes it's the "area of a church or cathedral, usually in the western part of the chancel between the nave and the sanctuary (which houses the altar)."