We've driven past RT O'Sullivan's a zillion times and always said we should eat there some time, but would always end up a BJ's instead. We finally forced ourselves to stop and were we pleasantly surprised. It's not much from the outside, looks like a dive bar. The inside is dark as you would expect a sports bar to look, but it was very clean and had lots of TV's and seating options, including a large outdoor patio. They had both Guiness and Four Peaks on tap and a wide selection of food.
I ordered the hot corned beef sandwich with a side salad and it was delicious. The corned beef was lean and included melted cheese and Boar's Head deli mustard.
Just beware of the Leprechaun on the way to the restrooms, I'm sure I've seen him on some horror movies.
We will definitely go back and it might even become out new haunt.