They were in one of the unoccupied rooms, where she had been replacing the bedsheets.

Turning his back on the already unoccupied room, he went out.

Outside, in the corridor, Jenny was coming out of an unoccupied room.

Not only was the room unoccupied, it was completely without furniture.

You're prepared, sort of, for the unoccupied room, the empty seat at the dinner table.

Like a gliding specter, he passed through the unoccupied room and made his way to the fire escape.

Inside an unoccupied room was a train set with toy mountains.

Deep inside the building, we entered a small unoccupied room.

"I think we'd better check all the windows on this floor, especially those in unoccupied rooms."

If you want to use any of the unoccupied rooms until they're assigned, feel free.