No, not our short-termed former Mayor, who famously never took a bus without a newsmedia photographer there to document it.
MYC Mayor Michael Bloomberg actually rides the Subway every day. So maybe it shouldn't come as a surprise that he rode BART on the way in from SFO to meet our interim mayor Ed Lee (who, it seems, met him at the BART station - Civic Center, I presume).
I'd love to hear his thoughts on the ride.
UPDATE BART TV has a little video of the ride: