Same here; I've explained to my wife that I love Costco, but their Achille's heel is that they don't have any Coors. They do have great deals on local craft brews though, the one near me carries a Two Brothers variety 24 pack, for about 24.99. Not bad, but I like to buy my cheap crap beer in bulk.
Primary 1: EdWort's Apfelwine
Primary 2: Yooper's Fizzy Yellow Beer
Primary 3: Surly Cynic
Bottled/Kegged: EdWort's Apfelwein, DC's BVIP, DFH 120 Minute Clone, Gratetful Dead Guy