Goth-tinged shop and art space Strychnin has branches in Berlin, New York, and London. If you're a fan of the dark side, and like art that looks like tattoos, then put some Korn on your i-Pod and head down to Strychnin.
The aim of the Strychnin is creativity rather than established artistic credentials, but exhibitions change roughly every month, so there's always likely to be something new of interest.