Pints of Guinness Draught beer are pictured in London, on May 9, 2008. Leon Neal/AFP via Getty ...More Images. AFP via Getty Images. It’s almost St. Patrick’s Day and yes, it’s time to drink ...

A slow pour of Guinness in front of a light shows that this beer is in fact red. Joff Lee via Getty Images The ruby red color is a result of the way the malted barley is roasted during the beer ...

Guinness, once synonymous with old Irish pubs and old Irish men, is increasingly winning over younger, beer-bent Americans like Mr. Quinn. “It’s having a moment,” he said.