I ate dinner here twice while on business in Madison. Erin's has Irish food, which is unfamiliar to me, but it is like comfort food. It was pretty good, but I don't think it would win any gourmet prizes. Sausage, potatoes, concannon, cabbage, roasts, fries, things like that. What really won my vote was their cocktails and beer list, I had a key lime martini that was like liquid key lime cheesecake! Amazing. I had two! And the next night I tried an "Adams Apple": Sam Adams with Hard Cider in it. I loved it! I had the Irish Breakfast for dinner and it was so-so. Like I said, no prizes, but the atmosphere here makes up for it. Fun, loud, lively, and homey. I'd go back if I were in the area again. They don't take reservations though, so get there early or wait 20-30 minutes.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.