O'Sheas "poker room" is laughable. It's not even a real room, just 4 poker tables placed between the Dublin Up bar and the doors to the strip. It is the only place where you can play poker right on the Vegas Strip and if you haven't experienced that it can be pretty cool and distracting at times.
The cocktail service was pretty reasonable. The casino was packed and the waitress still managed to bring a round of drinks at regular intervals. She also had a couple of extra 16oz drafts on her tray for anyone who didn't order but wanted a beer while she was dropping off. Which I thought worked out pretty well for everyone. She gets a tip and I get a beer without having to wait for her to take another round of orders and go to the bar to fill them.
The staff and dealers do a good job. Not the the best dealers in Vegas but not the worst either. There was a good live band on stage playing some John Mayer, Dave Matthews, and taking requests (and tips) from the crowd. All in all it was pretty good ambiance for a night of Texas Hold'em.