High Quality Content by WIKIPEDIA articles! The Rainier Club is a private club in Seattle, Washington; Priscilla Long of HistoryLink.org calls it "Seattle`s preeminent private club." Its clubhouse building, completed in 1904, is listed on the National Register of Historic Places. It was founded in 1888 in what was then the Washington Territory (statehood came the following year). As of 2008, the club has 1,300 members.