I am a little confused about dinner at Ashford Castle. The men I am traveling with are trying not to bring a jacket. With the small group tour are we given a choice of the restaurants we can eat at with the castle, or does everyone eat at the George V dining room. If so, it says jacket and tie required.
Are there other restaurants on the tour that would really require a jacket?
You have a choice of any of the three dining places (at time of your choosing) I mentioned for the two dinners provided. I believe there are no other establishments that "require" men to wear a jacket other the the George V. However, there are definitely places men might "seriously consider" wearing a jacket- Mount Juliet, Lough Erne, Merchant Hotel in Belfast (9 course Titanic Tasting Dinner), Farewell dinner in Dublin.
We were just on the small group tour of Ireland and stayed at Ashford Castle. They do require a jacket, however, if you do not have a dinner jacket they will provide one for you at the reception desk.