I really like your forum. And, I said that before elsewhere. I don't have any critique on the design or suggestions as to what to do about that. I still want to get around to reading the books, when I find time as they are getting such a better review than the movies. And, I like the volume of new discussions you have on the subforums about the Hunger Games movies/books.
However, I noticed that many of the discussions in those subforums have zero or few responses. On one hand, it's good that you have so many new discussions. But, then again, it might also put someone off from joining with the lack of new responses or any responses on so many of the threads. And, I don't know how to fix that, if you are still searching for new members. You might recruit some friends to come by and post only responses, if they are fans of the books/movies. Or, maybe post swaps. Someone else on this forum suggested that to me as an option. And, I've used it before for my own forum and it usually works. Though as I mentioned on another post, it can be tricky to use forum post swaps on a niche forum as you'll get lots of content in the general chat area, rather than the places where you need it most.