The family is flying in to SF for my daughter's graduation and we want to celebrate with a special lunch. Please suggest a special restaurant, preferably walking distance from Nob Hill Masonic Center ( which is on California St. , b/t Jones and Taylor). Quiet atmostphere needed so that we can actually hear each other during lunch. American or California cuisine,fish or upscale vegetarian is best. This is a great website that my friend Dave told me about. So thanks to him and all who are able to provide suggestions !