The Pacific Union Club is a private social club that was formed by the merger of the Pacific Club in 1852 and the Union Club in 1854. The club is currently located at 1000 California Street in San Francisco, California at the top of Nob Hill. Prominent members of this private club include a number of businessmen, the secretary of defense, British diplomats, and the California Attorney General. Caspar Weinberger, William Randolph Hearst, Jr., and William Reddington Hewlett the co-founder of Hewlett Packard were all members at one point of the club. There are many well known citizens today who are among the club's membership and today the club operates as an all male charter.
The clubhouse was built and designed by Willis Polk as the home of the silver magnate James Clair Flood. The clubhouse was a brownstone and made of quality material that withstood the San Francisco earthquake and fires of 1906. You must be a member of the club to access the inner dealings of the club and its membership. For the most part, the club is secretive but does do a lot of philanthropic and charitable activities. Membership activation is on a whom you know basis.