Poster printed with black ink on purple paper. A graphic of two hands pointed downward with the thumb and pointer fingers encircling a pair of eyes appears at the top of the page. A graphic of two women in elaborate costumes appears at center left and a graphic of two women dancing together appears at center right. A photo collage of people in various states of dress is printed along the bottom of the page. Poster text reads, "Margo St. James Presents the 4th Annual / San Francisco Civic Auditorium Grove twixt Polk & Larkin Streets / Hookers Masquerade Ball Fri 28th OCT 1977." A detailed schedule of events appears on the lower half of the page. [The Hookers Masquerade Ball was organized by sex worker activist Margo St. James as an annual fund raiser for the legalization of prostitution. -LMC]