Saint John's Tavern serves 200 pints of Guinness a night.

That's almost $1 million worth of cold ones a year.

“Guinness is the big boss over here but we love it.”

If you’ve left the house over the last few weeks, you’ve probably noticed that more of your friends are ordering pints of Guinness. Even as the global alcohol market shrinks, the brand has grown 15% this year, partly because splitting the G has gone viral and because more women are drinking it (at 210 …