T.G.I. Friday's is promising free burgers if you become a Facebook Fan by the end of the month. The catch is, there's gotta be more than half a million fans for the deal to be valid, but proving once again that people will do anything for a free bite, Friday Fandom has already exceeded 555,000. There's another wee catch too. Assuming your grub is golden, you've gotta snag it between Oct. 11 and 14. That's between Sunday and Wednesday. There are 11 Twin Cities-area T.G.I. Friday's.