If you build this I would be your first user. Don’t have time for much else but if I had a product I could use every day I would give you feedback. Ideal candidate is someone who has a job but craving a serious side project with small potential to turn into a startup. If searching for startup now, bad idea.
What about a primitive that could be use for places, but also for books, and basically anything that you can slap a rating system on it?