The San Francisco Public Library (Main Branch) has put up a great exhibit called San Francisco Eats. It takes up the two large galleries - the one on the 6th Floor and the Lower Level. A big collection of local restaurant ephemera including menus, matchbooks, photos, etc. They also have a flickr page with additional images. There also is a fun quiz to test your San Francisco restaurant knowledge to see if you know which restaurants appeared in which Hollywood movies. Now I just want to eat at the Pink Chateau!