Google
Google Maps allows consumers to write reviews for places they've visited. These reviews and opinions are voluntary. Google doesn’t pay reviewers for adding them to Google Maps.
Check Google for Reviews

Yelp
Yelp was founded to help people find great local businesses. In addition to reviews, you can use Yelp to find events, lists and to talk with other Yelpers.
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SuperPages
Superpages.com is THE Local Business Directory Including: Phone, Ratings and Reviews, Maps, Driving Directions, Address, Website, Hours of Operation and more.
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Yahoo Local
Yahoo Shopping is a good place to comparison shop for Local Business Reviews. Compare products, compare prices, read reviews and merchant ratings
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Merchant Circle
MerchantCircle aims to connect customers with deals, advice and price quotes from local small businesses. It ranks the listings from highest rated and most frequently reviewed, working its way down.
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Manta Reviews
Manta is a small business directory that helps local American businesses connect with consumers and each other. One of the features is allowing customers to leave reviews for a small business.
Check Manta Reviews for Reviews