The Washington Athletic Club, founded in 1930, is a private social and athletic club located in downtown Seattle. The 21-story WAC clubhouse opened in December 1930, and was designed in the Art Deco style by Seattle architect Sherwood D. Ford. The idea of the Century 21 Exposition was first conceived by club members within the building in January 1955. In 2009, the Washington Athletic Club became a City of Seattle Landmark, and in 2018 its 6th Street building was listed on the National Register of Historic Places.