Users can browse local clubs

https://trello.com/c/3jlq5dA4/52-as-a-user-i-want-to-be-able-to-browse-a-list-of-clubs

![image](https://cloud.githubusercontent.com/assets/8669803/5129076/728b9450-70ad-11e4-925c-0a0c2e48ece6.png)

`image_tag image_or_default` is repeated. Can you pull the `image_tag` into the `image_or_default` helper?