Pflueger's social and business connections spanned the city, including three private men's clubs which he joined: the Bohemian Club, the Olympic Club and The Family. He designed buildings and interior architecture for the latter two. Pflueger was highly placed in several important planning organizations: He was the chairman of a committee of consulting architects on the Bay Bridge project and he served on the committee responsible for the design of the Golden Gate International Exposition in 1939. Pflueger was a board member of the San Francisco Art Association starting in 1930, and served variously as chair and director. While on the board, Pflueger helped the organization found the San Francisco Museum of Modern Art (SFMOMA).