Even in cold winter, it is so warm in this atrium of the shopping mall called Sapporo Factory that was built up on the premises of Sapporo Beer Brewery.
About twice a year , Hula dance festival is held in this atrium, inviting special guests from Hawaii. A variety of events are held in this atrium in each season. Details of this facility are at http://sapporofactory.jp/
A tiny comfortable spa was on the top floor of this facility before and my wife and I visited there so frequently . I am not sure the space is used even now or not.