The setting is less a closed room than a cave.

That part of your mind is a closed and sealed room.

She was startled to find herself in a closed room.

Once again the cold wind blew in the closed room.

He would feel better talking in the confines of a closed room.

She was all alone with him, in a closed room.

She cannot, for instance, bear to be in a closed room.

Two hours later, when the closed room reached this deal, his prediction turned out to be wrong.

How else could secret information get out of a closed room?

The gun made a lot of noise in the closed room.