Walk down the hallway towards the potted tree. Turn left into the first room on the left after passing the potted tree. Stop after stepping into the room with the two beds.
Turn right and walk down the hall. Enter the massage room.
With your back faced towards the white wall take a right and walk through the open doorway and through the hallway made of glass walls. As you walk you will find a fire alarm on the left hand side followed by a door into a sauna. Take a left through that door until you face two sauna beds and that is your destination.