Anywhere in the LES on a Saturday night if you want a mixed crowd. There's a new spot, multi-floor place called DL (Delancey & Ludlow) that has vibes and women galore. If you want more blacks and less party, you can always check Harlem Tavern on a Saturday afternoon. LaLinea is good too for Thursday and Friday nights. As someone mentioned earlier, you can't lose at BOB bar even though it's small. Young hot things galore in there. On Sunday's there is a party in the back of Brooklyn Flea where they serve alcohol. The chicks in there are all the curly haired biracial big booty summer dress wearing artsy yet good smelling types.
Hope this helps. I got a few more spots, where you will see top notch talent, but drinks are 25+ off top n I dunno about you but I am not into paying that for an ounce of scotch or vodka.