To use a Surfing Photo Booth, click on the booth in either your home or a friend's home. Once you click it, you'll see your avatar on a surfing background and can pose yourself and take a screenshot. After you take a screenshot, you can share it on your wall. You also earn a little bit of coins for putting a surfing photo on your wall.
While it's clear that this feature is strictly to drive players to post on their wall to bring potential new players to YoVille, it's still a neat feature. Seeing your YoVille avatar in a surfing scene is quite cute and comical. Unfortunately, 12 YoCash isn't cheap - but perhaps a friend of yours will have a photo booth you can borrow!
(Source: YoVille Official Blog)