Free Drinks in Your Neighborhood
God, this is a great idea. Myopenbar.com tells you where and when you can get free drinks in New York City, SF, LA, Chicago, Honolulu, or Miami, pretty much every day of the week. Some require purchase of food or a cover charge, some are promo events, and some require lady parts. NYC gets most of the action.
The New York Times has the sordid backstory.