O'Hara's stout, of course. Guinness as it used to be 25 years ago might give it a run. (yes, I DO remember!). O'Hara's is very elusive on tap. It was supposed to be on tap in the Carlow Talbot hotel, but not available. I have had it in a restaurant in Carlow. If I am in Cork city, I have been known to drink Murphy's - not bad as a session beer.