Groupon has been up to a lot recently beyond their first vertical, the deal-a-day coupon phenomena. As of recently, they have also built up a very useful resource, Groupon Pages. They have developed a very extensive directory of many different types of businesses, but the one that seems the most popular is restaurants. Groupon Pages visitors can make reviews of places directly on the site and there is a lot of helpful info like business hours, pricing, a map, etc.
You can check out what a Groupon Page looks like here: Tampa Pizza Company
