I have been seeing Facebook Groups that are obviously for business purposes. What amazes me is that the posts are dynamic just like an active forum. And the admin has complete control because if the post is not related to the niche then it is deleted. With the Facebook Page, it is more direct and not exactly appropriate for business. But it's a good area to cultivate because the followers are prospective clients already although you need to be creative in making your marketing posts. And the Facebook Page works like a blog so you can have a captured audience.