Where can you find possibly the best Guinness in town? At Iona (Grand Street, Williamsburg Brooklyn). Thanks Tony for sharing the secret. Even better that you're friends with all the bartenders.
It's best to avoid "the shit show" as Tony would call it by avoiding Williamsburg on Friday and Saturday nights. All of us are too old for that crap. We liked sitting at the bar of this Scottish and Irish joint when it was mellow and we were able to slowly enjoy the Guinness masterpiece. We didn't mind the DJ playing reggae that night either.