Go through the doorway. Turn left and go through the door to the white rug. Go to the top of the stiars. Continue past the stairs and go right. Follow the white rug to the doorway on the left. Stop in the doorway.
Walk forward into the hall and take a left. Take another left, and go around the stairs. Enter the room that is the second door on the left, and stop in the doorway.
Exit towards the stairs. Find the entrance to the stairs going down. Pass the enterence to the stairs until you see the runner rug to the right along the stair railing. Follow the rug until you reach the doors to a large ballroom to your left. Wait here.