Apparently, there really is such a thing as a free lunch. Today, from noon to 2 p.m. Croc's, the Mexican bar and grill at 1630 Market Street, is offering just that -- and the catch is that there really is no catch. Okay, so you've got to keep your spending habit under ten bucks, and you'll need to mention that you saw the deal on Facebook, which inisists "Come one, come all, come hungry." That means you. It's just the kind of sweet deal we need on such a sucky day.