Tony Bennett had it right: Not only will you leave your heart in San Francisco, but it's easy to fall in love here too. It's especially easy over a romantic meal. Of course, you can opt for the classic Valentine's Day favorites like The Big Four and Cafe Jacqueline. But you have many other options, from low-key charmers (like La Ciccia) to island-theme spots (Louie's Gen-Gen Room) to literal island destinations (Treasure Island's Mersea). These eight restaurants know the recipe for romance.