ok... well good music to some people would be Top 40 hits played on the radio? Rock? Rap
or
True Dance Music (House, Techno Trance)
Anything on Division street or Rush is going to be completely mainstream.
If you want bad ass in your face clubbing try:
Crobar - http://www.crobar.com/
Zentra - http://www.zentranightclub.com/
Sound-Bar - http://www.sound-bar.com/
Vision - http://www.aceplaces.com/vision/index.html
Depending on what night you are going to be out... saturdays are usually the busiest and most fun.