I'm thinking of running a street-level gang-style game and I'm wondering if anyone knows of any good supplement books that go into the details of the ins and outs of that lifestyle. I tried looking through my White Wolf World of Darkness collection (as their books are usually pretty well researched and detailed) but couldn't find anything appropriate.

I'm looking for...well, basically a guide on the lifestyle, common crimes, common tactics, memberships requirements and perks, etc. I'm a Canadian living in a small rural community on the West coast and the idea of gangs isn't even present locally, let alone a real one so kind of clueless and you can only glean so much from media.

NwoD has a supplement called Chicago which if I'm correct may have some information on what your looking for. Maybe you have it or heard of it Panda?

Yeah, that's the kind of thing you'll find in a city or adventure supplement, not on its own unfortunatly. And oWoD or new?

I would recommend the Godfather movies and such.
Art imitating art, imitating life, imitating murderous scum.