No idea what the theme is, what the wadrobe selection will be like, or what the styling or Art Direction will be, but here's my blind suggestion:
Go to Boat Quay. Go behind the back alley there.
It's so grotty and cluttered and crappy that it would make a perfect setting for multiple strobe/gels set-up (think garish, multi-coloured neon SFX) shots, and give you a perfect combination of edgy, surreal as well as 'street ghetto' (you did mention 'edgy' and 'DJ').
All the best for your shoot

and no, spamming of any sort is generally not accepted here even though some spams do slip thriough once in awhile.
Oh yeah baby! Just found this:
http://images.google.com.sg/images?hl=en&q=back+alley+of+boat+quay&btnG=Search+Images&gbv=2&aq=f&oq=