The Alpha Omega Club collection consists of scrapbooks containing invitations, napkins, party favors, and score cards for card games; minutes indicating who was in attendance, describing decorations, food served, gifts given and activities; newspaper clippings of club and member activities; postcards and notes from members travelling; and group photographs of Club members (1920-1960).

Alpha Omega was a women's social club and sorority. The sorority was first organized in 1905 with chapters in Sacramento, Oakland, San Jose, and Stockton, California. Minutes indicate that about 12 women attended meetings at each others homes. In the 1920s the women sewed, gossiped, and played parlor games. From the late 1930's "auction" bridge became an important activity. On April 19, 1932 the Alpha Omega Old Girls Club (or Old Girls Club of Alpha Omega) decided to become a Birthday Club. Meetings were held once a month at a member's house on or near her birthday. There would be a celebration and gifts would be given.

Collection is open for research.