Shake Shack is mixing it up. The restaurant will turn a handful of its locations into fine-dining eateries later this month, with a prix-fixe menu, table service, fancy plates, white tablecloths, gold utensils, wine glasses, and lots of truffles. The ticketed dinner costs $20 per person and comes with a truffle burger, a truffle mushroom burger, parmesan fries with truffle sauce, a shake and unlimited canned wine. The dinner series runs from February 27 to March 2 in select cities with reservations available online now at thetruffletableatshakeshack.splashthat.com. What was the best dive you ever ate at?