"Ah... sorry..." he said when he realized his mistake. He didn't think the man looked particularly unattractive, and wondered why he considered marriage so unlikely, but perhaps it was only meant as hyperbole. Awkwardly, he listened to the woman scolding the man, almost about to take a sip from his drink, just the have something to do, when the barman seemed to realize he didn't like Guinness. Was he a mindreader or something? "Oh... well... something local?" he asked again.