It was a weird sight: Blondes on Parade

I had brunch yesterday at Citizen Cake with a couple of friends from out of town. After the brunch, I drove near the Civic Center to take them back to their hotel. I knew something was up when I saw a couple of helicopters overhead, but the square looked driveable so I took a left on Larkin. What we saw was the strangest sight - hundreds of women in the same blonde wig walking toward the library quietly. There wasn't a loud demonstration going on, and we couldn't figure out what the purpose of the blondes could be. After dropping off my baffled friends, I went back to investigate. Turns out there was a commercial being filmed. I have no idea what for. I think that the "only in San Francisco" moment was not really that there was this very strange scene, but that my immediate question was what these people could possibly be protesting. Click on the photograph for a larger view of the blondes.