forre, we're not just talking about the politics forum.
Look at the big picture - if we do change the theme of the site to Russian music, there will be more visitors (as more people are interested in Russian music then those who are interested in Tatu); more visitors will mean we'll have a greater diversity of opinions, view points, interests, characters... etc etc. So we'll naturally need more forums to discuss it in.
But as I said, even changing the theme of the forum is a long shot. We still need a new domain name, since the "tatu" part will scare people away - not everyone in the world likes them. Lol.