Your best bet is Shelter, thats quite a small club and it doesnt get much of a crowd on a friday night, the old DJ was awesome, he used to play stuff like underoath, saosin, Taking back sunday, alexisonfire, he played a dash of indie and some ska and punk like less than jake, reel big fish, offspring, etc. The new friday dj plays more metal, stuff like disturbed, Pantera, not really my type of music, they do play a variety of rock though. Saturday nights at shelter used to be mainly indie based but with the new dj its a lot more metal based. The other place to go to for alternative music is the bierkeller on a friday night, they play a lot of metal, a bit of emo and punk. Theres also the second room at propaganda in panache, on a wednesday night, I've been there far too many times though, its not as good as the keller. oh yeah, need to answer the touring part, many emo bands miss bristol, BUT the Taste of Chaos tour happens in Cardiff which is only 40 mins away by train, I went to the last one and bands such as Saosin, taking back sunday, underoath, alexisonfire play that. On a random note, I have seen quite a few scene kids around on the weekend, a lot of them just happen to be under age and so cant get into places like shelter lol...