AC Golden, the tiny MillerCoors-owned brewery located deep inside the hidden corridors of the mega-brewer's Golden plant, will put three unusual beers on tap tonight only at Star Bar, the tiny Larimer Street watering hole known for its craft beer selections.

The beers are all ales, which marks a major chance for AC Golden, which makes lagers almost exclusively. Those include its most popular brand, Colorado Native, along with Herman Joseph's Private Reserve and Winterfest and a couple of dozen experimental beers that have rarely made it outside the brewhouse.

The Star Bar ales are: American Wild Ale, a sour beer aged for a year in French oak wine barrels and then pressed with merlot grapes; Barrel-aged Russian Imperial Stout, aged nine months in a whiskey barrel and weighing in at 13 percent ABV; and Belgian-style Saison, which was brewed with oats and wheat and fermented with three different Belgian yeast strains.