(OnMilwaukee) - No one thinks twice about drinking beer on tap. But what about wine? Wine served from a keg has a long-standing history in Europe; but here in North America, wine on tap has been brought to the market and failed on multiple occasions, and it wasn't until very recently that the concept began catching on in a sustainable way. The fact is, a growing number of restaurants and bars are putting kegs of wine behind their bars, pouring wines by the glass from a tap. Milwaukee area establishments like Bernie's Tap in Waukesha, Balzac Wine Bar, Braise, Camp Bar in Shorewood, The Ruby Tap in Wauwatosa and Rumpus Room all offer wines on tap.