Ladies' Big Bang

That wouldn't be allowed. Multicategory sign-up means that you're signing up to create in more than one category -- so, for instance, mixing fiction and poetry is fine, or mixing fiction with some graphics etc., but if you're only creating with fiction then the minimum is 10,000 words. All we require, however, is that people present one unified project at the end, so doing something like writing three pieces that are linked together (e.g. they're sequential stories, they're all in the same universe, use the same characters or are somehow otherwise thematically linked) would be acceptable.