Mary Ann Pollar

In 1978 Pollar "began a new career at AC Transit, where she organized a local union for management employees."

In 1971 Pollar founded The Rainbow Sign, an African American cultural center that operated from 1971 to 1977 on Berkeley's Grove Street (now known as Martin Luther King Jr. Way). Slate described Rainbow Sign as having been "brainstormed into existence" by Pollar. She took the center's name from the verse of the spiritual Mary Don't You Weep ("God gave Noah the rainbow sign, no more water the fire next time!"), a verse also alluded to by James Baldwin in his book The Fire Next Time (1963). Pollar "envisioned an art gallery, cultural center, meeting place, and restaurant," and "as a concept and organization, the cultural center was meant to exist as a bridge across all borders—ethnic, national and political. Rainbow Sign concerned itself with sustaining and strengthening the diversity essential to any viable movement toward the liberation of all people."

Pollar began promoting concerts in the 1950s in the San Francisco Bay Area. Pollar had an enduring friendship with the folk singer Odetta, for whom she named her daughter Odette in 1955. Rolling Stone reported that Pollar was responsible for Bob Dylan's first appearance on the West Coast, in 1964 at the Berkeley Community Theater. Odette Pollar reported that before booking Dylan's first West Cost concert, her mother had "turned him down twice, because she'd never heard of him". As a concert promoter, Pollar booked Odetta, Dylan, and other artists that included Sonny Terry and Brownie McGhee, and many others, many of whom she first introduced to the San Francisco area. A project on historical documentation at the University of California, Berkeley, wrote that

Mary Ann Pollar (1927–1999) was a California-based concert promoter and founder of the Rainbow Sign, a prominent African American cultural center in Berkeley that operated from 1971 to 1977. Later she was also a transit administrator.