MLive.com This special Belgium sour beer is only in Michigan at Jolly Pumpkin MLive.com DEXTER, MI - Jolly Pumpkin's Dexter Taphouse is the only place in Michigan, and one of 72 breweries worldwide, serving up a special Belgium sour beer for Zwanze Day this month. In its 10th year, Zwanze Day was started by Belgium brewery Cantillon to ...