Beer and a Haircut
The aptly named Michael Puffer, an intrepid investigative reporter for the Danvers, Massachusetts, Herald, asks for a cup of beer at a local hair salon, receives the complementary beverage he requested, and returns the favor by ratting out the owner for serving liquor without a license. Then he brags about the feat in print. It makes you proud to be a journalist.
[Thanks to Doug Geiger for the link.]