Campo is a center of Rome nightlife, especially for American students and expats. There are a couple American bars here, lots of other bars, and several good restaurants. Campo at night is a sea of people. I prefer it in the mornings – weekday mornings Campo turns into a huge outdoor market. Most of the stands are fruit and vegetable stands, but you can also find meats and seafood, touristy-type things, and one guy who sells about a hundred different kinds of spices and spice mixes (go talk to him, he’ll break out his scrapbook of newspaper articles he’s been featured in). Campo dei Fiori is definitely one of my favorite places in Rome.