A jjimjilbang (; , ) is a large, sex-segregated public bathhouse in South Korea, furnished with hot tubs, showers, Korean traditional kiln saunas and massage tables. "Jjimjil" is derived from the words meaning "heating". In other areas of the building or on other floors there are unisex areas, usually with a snack bar, ondol-heated floor for lounging and sleeping, wide-screen TVs, exercise rooms, ice rooms, heated salt rooms, PC bang, noraebang, and sleeping quarters with bunk beds or sleeping mats. Many of the sleeping rooms have themes or elements to them. Usually jjimjilbangs will have various rooms with temperatures to suit guests' preferred relaxing temperatures. The walls are decorated with woods, minerals, crystals, stones, and metals to make the ambient mood and smell more natural. The elements used have traditional Korean medicinal purposes in the rooms.