On January 10, 1896, the Ladies Choral Society was organized as a branch of the Petaluma Woman's Club. The Club was reorganized in 1900. It was first named the Woman's Club of Petaluma and was later renamed the Petaluma Woman's Club. Over the years, new branches of the Club were formed. The Clubhouse on B Street was started in 1913 and designed by famous local architect Brainerd Jones. Over the years, the Club has grown and changed. Today, the day group of the Petaluma Woman's Club (or PWC) holds one meeting a month.
In January 1996, Club membership was expanded by adding an evening group. The evening group of the Petaluma Woman's Club holds regular monthly meetings on the third Thursday of each month. Both groups offer women the opportunity to socialize, network and make new friends in the community.