I have never been to a Fionn MacCools before, I had a great experience here.
I ordered a Guinness Steak and mushroom crock. It contained large chunks of steak and the sauce was quite tasty. I savoured every bite. I also tried a beer called "barking squirrel" the waitress said it was tasty and she was right. It came in a tall glass with a little outline of a squirrel looking annoyed. I thought this was hilarious.
The decor was typical pub style with a few TV screens mounted on the walls here and there.
It seems that they can accommodate any size group. The service was great and I would go back here if I was in the area.