Opentable gave a great presentation on this not too long ago, check it out <a href="http:&#x2F;&#x2F;www.slideshare.net&#x2F;SudeepDasPhD&#x2F;recsys-2015-making-meaningful-restaurant-recommendations-at-opentable" rel="nofollow">http:&#x2F;&#x2F;www.slideshare.net&#x2F;SudeepDasPhD&#x2F;recsys-2015-making-me...</a>