A few things to remember when trying to pick up black chicks (especially black chicks from the hood):
1) Always ASSUME ATTRACTION. No matter what, she wants you, from the get-go, every step of the way. She will most likely act like she doesn't, like you are a piece of shit she'd never even consider allowing between her legs. It's exactly that: an act.
2) In accordance with #1, she is going to shit-test you like crazy. Recognize them and either pass or ignore them.
3) Kino freely and without inhibition. Black women care a lot less about "looking like a slut" or being too forward in public. Pushing the limits on this is a measure of your confidence for them. Be bold
4) Break stereotypes. Judging from your username, I'm guessing you're latin

I'm not sure how it will work for you, but as a white guy it was always important that I demonstrate that I was the antithesis of the "rich pretty boy out here fucking up," role that was assumed about me. Basically, let them know you are coming from a similar place in life as them.
5) Pre-selection and social proof still apply, but you have to deal with the ensuing shit-test gracefully for it to be effective.
Hope this helps
Your boy,
870