Just came across Hotpot.
The UI is very simple to use once you get into it. You simply search for a location and then rate/review. The list of locations has already been pre-populated by Google Map’s places.
This site wants to be social, but nobody I know has accepted my Hotpot invite yet. This includes a Googler who I assume is too busy swimming in money.
One gripe I have upon my first visit, Hotpot was stuck on a page requiring me to update my Google profile username before it would let me review places. While I can see why you’d need a public username, it was a speed bump holding me back from instantly using the site.