Bristol O2 is a turd of a venue in a city full of brilliant live music venues. Tickets and beer are far too expensive, the sound sucks, for the first four of five songs if you're at the barrier you can't see anything except the photographers right in front of the stage.
While I appreciate good security is important, they are rather over enthusiastic at the O2.
Fortunately most bands I want to see seem to be at Motion, SWX, Thekla or The Fleece which are all excellent venues.
I'm off the The Fleece next week for Agnostic Front, can't wait for that one.