Giles M.
Google
The Camden Underworld. A perennial favourite having spent more than half my life treading its boards as both a punter and promoter.
Great staff, great sound system, The Underworld has played host to much fun and debauchery from the likes of H09909, Enter Shikari, Lawnmower Death, Phillip Anselmo (of Pantera infamy) to, most recently, PIG.
It's one of London's best intimate venues and I absolutely love it.