This mission is given by Eddie Scarpa.
"Joe, got a little situation here. Seems some fuck got a little too hands on with my number one girl at the cathouse last night. Scared her so bad she's refusin' to go to work. I ain't got time for this domestic shit, Joe. I want ya' to head to this fuck's place today, and make sure he understands the rules. Don't go doing nothin' too crazy, guy's one of our best customers."
Start the mission and drive to the house in Hillwood, and watch your speed along the way if you don't want to deal with the police when you arrive there. Pick the lock on his front door and enter his house.
The first guy to confront you will be his bodyguard. Beat him until he's had enough then make your way to the back of the house and out on the balcony where the main target is, then repeat the process with him.
Playboy magazine #10 is located here.
When you're done feel free to grab some food from the fridge if you need health, then head out the way you came and the safe zone icon will be in the driveway.