OpenTable makes it easy to make restaurant reservations without having to call around. You can pick just about any city in the US, and they have a listing a restaurants that you can make reservations for. The nice thing about this service is that you can also check out the menu of the restaurant as well as get an idea about cost in addition to user reviews. This way if you don't really know where you want to have dinner, they can help you decide. And once you do decide, you can make a reservations right on there site.