You will want to check out the Fraenkel Gallery, the Wirtz Gallery, the Scott Nichols Gallery, etc. All in one building & not open Sunday or Monday so that probably makes it the 16th for you. The galleries are all in the same unmarked building @ 49 Geary, around the corner from Union Square or the downtown Ghirardelli, Virgin Megastore, Apple, etc. in case the family's not too keen, & near 77 Geary (which has less photography)

http://www.kochgallery.com/

http://www.hainesgallery.com/

http://www.fraenkelgallery.com/

http://www.wirtzgallery.com/

http://www.scottnicholsgallery.com/