I agree that a bar is generally not appropriate for children, but the lounges onboard ship are pretty tame and family friendly. Mostly just normal people enjoying some music, dancing and silly trivia games while having a few cocktails. The kids (I was also traveling with my 8 and 9 year old nieces) really enjoyed the dancing and were even invited up to dance with the cruisestaff during the 50's dance party theme night. Definitely not the wild drunken pick-up joint type bars that usually comes to mind. The only place I didn't feel comfortable taking them was the disco, which I felt was too loud and wild.