I set one up on a page for a locality just to try. Used the poll feature. "What is the best place for lunch in town?" I listed about eight places, put in a link in the comments to our restaurant directory in the comment, allowed comments to be posted, allowed other restaurants to be listed. (The UI allows you to delete if someone puts in a listing you do not like.)
Our FB section has not gotten a lot of traffic, but we have not pushed it. This will be a good test.
Thanks engine for the post.