curtains notice how the clients' chairs must be ELEVATED to be ergonomic for the techs to do work! i'd make a box/stage out of cedar so it'd smell nice and deck out the salon with succulents on the wall and go with a clean garden theme!
Nice use of the tray. Could hold treatment raw ingredients to mix in front of the client. It might hold water and a sliced apple or orange for your client after the massage for a nice unexpected service that costs very little.