Though I've been targeting businesses with lots of foot traffic and churn (e.g. restaurants, retail stores, bars, service providers), I recently got a Dentist's office as a client. It's going to be fun to see if a place people don't exactly go to for fun can nevertheless take advantage of the free ads provided by apps like Foursquare and, perhaps, Groupon . . . as well as other methods like Facebook fan pages, etc. Anyone have any experiences to share. http://amplify.com/u/bzwqp