Exit the sauna, exit the massage room, take a left, go straight into the diagonal doorway, take a couple steps in and stop.
Exit the sauna and walk through the doorway on the left. Turn left, then walk through the second doorway. Wait in the bathroom by the partition.
Enter the room with the two beds and walk out the door on the left side of the second bed. Turn left and go into the second doorway you pass on the left after exiting. Walk into the room and stop in front of the first panel of the screen in the room.