The Apres’ Ski Cocktail Classic starts mixing in Snowmass on Thursday. This year whiskey will be playing a central role. The brown liquor is gaining popularity. Last year, sales of whiskey in the United States jumped 6 percent. More than 5 million cases of whiskeys were sold including Irish, blended, Single Malt Scotch and American. As Aspen Public Radio’s Marci Krivonen reports, one local whiskey-maker is jumping into the action.