Calling all south londoners!?

Hi there, I was just wondering, what's a really fun place to go in south london? Not necessarily for a date but like somewhere maybe a music venue thats quite cheap or a lively bar that's not poncey - just somewhere cool and fun basically! I live in south london but i'm always in the north like camden, kilburn etc and great as it is it's quite pricey round there and i'd like a great night out a bit more on my doorstep! If there's somewhere amazing thats just outside of south i'd be interested too :)