Increasing site views?

Well I have a friend who has this website. its a good site and he had to write everything for it. He used the basic php forum style though. But its a really good site except no body knows about it. Ive suggested several ways how to increase people coming to the site but he doesnt really like them and now I am out of ideas… Can anyone think of some?

On there you can submit and view others artwork, articles, videos, and tutorials. There is also a forum where you can discuss games, artwork, school (even though its already over for some), entertainment such as movies and sports ect. And it also has a general community with a shop and quests to complete.