The former Carnelian Room and Bankers Club atop 555 California has been leased, to a GAMING COMPANY!!!
The tech world is continuing to infiltrate the traditional Central Business District, no longer the home to stuffy financial services firms.
See here from the SF Business Times: http://www.bizjournals.com/sanfrancisco/blog/2013/12/sign-of-the-times-finnish-gaming.html?ana=e_du_pub&s=article_du&ed=2013-12-05
