This place wasn't anything spectacular but I don't really have much in the way of complaints.
I went here because my buddies wanted to play in the Beirut Tournament (that's Beer Pong of the unfamiliar). They didn't do great because of the rules, but that didn't stop me from having a good time. They offered a boat load of free drinks, shots, and beer bongs which was fun but their pitchers of beer seemed a bit watered down.
The people there were friendly and the employees accommodating. It didn't seem too be very Irish, but it's Vegas; everything seems a bit watered down in the way of authenticity.
I'll return if I'm ever at the Rio.