Couzins joined the Board of Lady Managers for the World's Columbian Exposition in 1890.
On March 19, 1890, Phoebe Couzins furthered her influence by being appointed as a delegate to the Board of Lady Managers for the World’s Columbian Exposition in Chicago. She briefly served as secretary to the board, a role that demonstrated her organizational acumen and leadership. The World’s Columbian Exposition was an important cultural event, and through her appointment, Couzins symbolized the increasing involvement of women in influential social and political roles, reflecting the progressive strides the women's movement was making during this era of American history.