My wife and I wandered into Pat O's last February on a Saturday afternoon. They had a man and a woman playing the piano (both in their mid-late 50's) but they were good. There repetoir of music was mostly Country (Patsy K., etc.)
We decided to have a drink and after about 2 hours they changed players to 2 guys, (mid 30's) both who were excellent! Their set consisted of Van Morrison, Rod Stewart, Sting, Elton John, MeatLoaf, et al.
We decided to get some food (reasonably priced and quite good!) and low and behold another 2 hours passed and they changed again; young lady and young guy (late 20's-early 30's). They were the best of the bunch! Their set consisted of Sting, Luther, Billy Joel, Cher, et al.
I HIGHLY recommend it!