Plan a whole day around sampling food

Rather than having an entire meal at any one restaurant, move around and snack. The idea isn't to get uncomfortably full, but to expose yourself to different kinds of restaurants, gourmet shops, markets, and even snack stands. For obvious reasons, you might want to incorporate a bit of walking into this plan. You should also try doing this on a weekday, as restaurants are less crowded and more willing to let you drop in for just an appetizer or dessert.