Not that Groupon is ever a horrible deal, but today’s listing for Mado is especially appealing. Pay $20 and get $40 worth of food, which isn’t so bad for a place that was featured last year in Bon Appetit’s Top 10 Best New Restaurants in America. In other Mado news, while no spaces are left for the April 18 hog-butchering demo, six spots are still available for Sunday, April 11th. They said to hurry. [Groupon]