Visiting SF from Boston and would like to reserve for Christmas Eve -- not a holiday dinner, just a nice place, interesting, and not Chinese. Have been to Boulevard, Farallon, Hawthorne Grill other trips; this time looking for something less expensive (will be with my 23- and 17-year-olds). Suggestions for a don't-miss restaurant that will be open on the holiday? Our other nights we have reservations at Zuni Cafe, Delfina, Plouf...unless someone tells me otherwise! Thanks!