Are there any 4chan boards that host regular threads for writing fanfic? Or failing that, for original stories based on a prompt. /v/, /a/, /co/ have their fair share of threads for drawfags, but seemingly nothing for writers. Literally the only board I've seen with regular fanfic writing threads has been [spoiler:lit]/mlp/[/spoiler:lit]. Are there any others?

If not on 4chan, then at least on other imageboards?