REWARDS - Respect
Drive to the blip to B Dup's house. You'll get a cutscene between B Dup and CJ and you find out that B Dup and Big Bear aren't the friends they once were. Once outside, get into a car and drive to the next blip on the radar. Once there, you'll get out of the car and find a dealer with one of your gang members. Beat the crap out of him with your fists and Ryder mentions that he recognizes him and also knows where his place is. Pick up the baseball bat before getting into the car.
Once inside the car, head across the tracks and into the red marker. Get out of the car and go inside the crack den. Once inside, you'll have to take out 3 Ballas. Take care of the twins (Ryder will take one out), then go after the one in black. Target them, then go outside once all three are done. Drive back to Sweet's house and go into the red marker to finish the mission and earn some more respect.