That's a cool idea. It needs to link somehow to a database of all the items that have been reviewed so that we can see all reviews of the same thing together. For things like restaurants there needs to be location data to show them on a map. Once this gets known then the reviewed vendors might start accepting Steem.

I'd like to see a market for goods and services for Steem. I know this has been attempted, but the userbase may not be big enough yet. It should include its own reputation system so that people can be sure they will really get what is offered, much like ebay.