While on a trip to the UK, I was told that in Northern Ireland, if you drink Jameson’s, it means you’re a Catholic, and if you drink Bushmill’s, it means you’re a Protestant.
Checking on the web, I find that this is dismissed as an American myth, but a real live Irishman told me that it’s because Jameson’s is made in Cork (in the Republic) and Bushmill’s is made in Northern Ireland. Both companies are owned by huge international conglomerates, so I don’t suppose it matters which one you buy, in terms of professing a religion.
That said, I was amused to find that I’ve been a devout Papist all these years. Now, what does it mean if you prefer poitín?