I have been to O'Sheas at night before. We tried to play beer pong but it was super crowded, beer all over the floor and there just seemed to be no way we could get a table.
Came back Friday morning. and yes I mean morning BEFORE lunch. There were already couple of people playing beer pong but it was still clean and there were a whole bunch of tables open for us to play. We got 4 pitchers of beer between the 4 of us and I can't even remember how many games we played. I don't even remember the walk back from O'Sheas to our hotel to check in.
I had such a great time since I didn't have to mess with the crowd or the messy floor. The bartender even gave me discounts on the 3rd and 4th pitcher!
If only this place was like this all day I would give it more stars~!