RB's Threading Studio, Burlingame

As the aestheticians at RB's Threading Studio deftly twist cotton thread over skin to remove unwanted hair right from the root, they're participating in a centuries-old tradition. Threading is a very old beauty technique, with roots in ancient India, and boasts generations of adherents. While this is the spa's specialty, RB's staff also offers facials, massage therapy, bodywork, and even waxing, an alternative to its signature treatment.