Beer Bars Los Angeles

I'm in Los Angeles for a night on Friday November 21 I'm traveling in the UK. Where is the bar more refreshing?
I was hoping trapping a group at the Viper Room or something similar. Any suggestions? I have 24 and the male, and I like a good beer.
If you go to the Viper Room can also easily reach the Troubador, Whisky A Go Go, The Roxy, House of Blues, Rainbow Bar & Grill Knitting Factory and the Key Club with live music are all in the same neighborhood. Bring money for a taxi. If any of these places has good beer is something else. Barney's Beanery on Santa Monica Boulevard. has a selection of great beer, but it is a bar / restaurant. Jim Morrison, Jimmy Hendrix and Janis Joplin all hung out there at one time or another. All clubs have websites to check for see who's on the bill for that night and go see a show.
Guitar Hero Bar (Los Angeles, CA)