I'm not sure what exactly you're looking for here. Is this to be a discussion or a roleplay?
If a discussion, then the best place for it would be on the General Board or in the Personals forum either as a personal ad or in the Playground.
If it's a roleplay, normally the thread starter begins the story or at least puts out a premise for one. If you do that, I'm sure someone will reply -- though possibly not in the first five minutes.