Denver doesn't have an In-N-Out burger. But it has the next best thing: a Griff's, one of the few survivors of an also-ran chain in the burger wars of the last century. We love the weird, lost-outpost vibe of this Griff's, the sense that this spot has been cut off from history and forgotten by the powers that once brought it into being. And if we were ever going to get a tattoo, Griffy — the psychotic, lobotomized clown mascot of Griff's — would be high on our list of possible body art. But even more important, if you pull up to Griff's drive-thru window, you'll be rewarded with a fine burger, excellent fries and a shake so thick it'll kill you if you don't let it thin itself a little before you wrap your lips around the straw.