Bar 37 on Dawson St isn't too bad, trendy crowd and 80's/90's music
Toners on Baggot st. Is like Kehoes inside but there is an enormous beer garden/smoking area out the back where you can see everyone without a haze of smoke around you!
The Grafton Lounge near Kehoes, it's a 20+-30/40+ crowd chart/dance music.
PMacs is really good
The Hairy Lemon, but I always find it's over-packed.
Dakota, again quite a trendy crowd with pretty good music.
All the above in safe areas.
Hope they help and you have a great time in the big schmoke!!
xx