Great article in Hoodline that includes video clips of the bands that are scheduled to play at both of the main stages.
Headlining the Amoeba/Stanyan Stage are Quicksilver Messenger Service (2:00-3:00pm) and Jefferson Starship! (3:15-5:15)
Source: Introducing The Bands Performing At 2016’s Haight Ashbury Street Fair | Hoodline
Stannous Flouride's Book of Truthiness 