The wine country's got a lot of nerve, thinking that just because it's got serene vistas, delicious food, and copious wine you should always have to drive to it. Now coming to you: Healdsburg's Cyrus.
Chef/owner Doug Keane's taking his vaunted Cali-French show on the road, offering the Cyrus experience (stately presentation, 4-8 courses, fawning service) anywhere in the Bay for parties up to 50 (if you need catering for more, consult your bridesmaids).
Just ring up the resto for a course consultation (what/how many); dishes vary seasonally but expect variations on current goodness like seared foie gras w/ rum flambé and pain perdu, and mustard frothed pappardelle w/ braised rabbit, as well as Cyrus' caviar, shaved truffles, and artisanal cheeses -- which will have you shouting "Artisinal cheese, please!" despite the lack of ball pit/animatronic mice.
The grub's prepared day-of-shindig, and delivered along with Cyrus serving staff, tables, china, as well as linens (Linens n' Things?).
Cyrus can also handle beverages, either by stocking you from their Sonoma-centric wine list, or sending out bartenders to mix specialty cocktails like the zesty "Bardstown Sazerac" and the gin/maraschino/chartreuse "Last Word" -- which, since you're already comfortably at home, should be "more".