Crooked Stave brews what is perhaps the most challenging style of beer — not just for the palates of the general public, but for craft-beer lovers, as well. Sour and wild ales are fermented, usually in wooden barrels, with specific kinds of yeast and bacteria that add funky, occasionally off-putting and potentially addictive flavors to beer. It's not a new fad; the Belgians have been making this style of beer for hundreds of years. But almost no one in the country, let alone Colorado, does it as well as Crooked Stave owner Chad Yakobson, who has built up such a fierce following that his skills are borrowed by other brewers across the country and his ales are talked about by beer geeks around the world. You'll always find a couple of them on tap in the Barrel Cellar (along with interesting people from unexpected places). Crooked Stave will triple its production this year, from 450 to 2,000 barrels, which still makes it one of the smallest breweries in Colorado, but one with an enormous footprint.