Depends on what you count as the Bay Area, but here's a tally for a sort of extended version of it:

   CA-2: Huffman (D), yes
   CA-3: Garamendi (D), yes
   CA-5: Thompson (D), no
   CA-11: Miller (D), yes
   CA-12: Pelosi (D), no
   CA-13: Lee (D), yes
   CA-14: Speier (D), yes
   CA-15: Swalwell (D), yes
   CA-17: Honda (D), yes
   CA-18: Eshoo (D), yes
   CA-19: Lofgren (D), yes
   CA-20: Farr (D), yes

So 10/12 of the Bay Area voted yes, rather disproportionately in favor compared to the nationwide vote. Until putting together this list, I hadn't actually realized there are no Republicans in the entire extended Bay Area, incidentally. You have to go all the way to Modesto to find a GOP Congressman (in CA-10, where Denham voted "no").

Because the SF people vote her in like sheep, again and again. She knows her seat is not threatened, so she'll vote in her _own_ interests.

I refuse to vote for her. I'll vote for the Republican challenger every time.

Or, perhaps a little less cynically: she's the minority leader so she's expected to vote in the party's interest. When your party holds the White House that basically means supporting the administration.

I don't mean this as a defense of Pelosi though. I'm also in CA-12; I usually just abstain from voting for US Rep.