Slobodkina joined the Artist’s Union in 1934. Members of the Union included Arshille Gorky, Balcombe Green, and Stuart Davis. As Slobodkina recalls in her autobiography, many gatherings were dedicated to the debate between making socially relevant art and “art for art’s sake” (Notes for a Biographer, Volume II, p.377). Slobodkina was active in the Union, lobbying for employment of all artists through WPA projects. She took part in many meetings, demonstrations, and helped organize delegations to be sent to Washington (Ibid., p.405). Slobodkina was on the Union’s fund-raising committee, which held a number of small parties and events, as well as an annual ball. Slobodkina designed a number of promotional posters for these events, two of which survive: Beer with Your Melodrama, Latest Styles for Unemployed Men and Women, and Ambulance for Spain.