a little tip when you go to kill Playboy X, before you hop out onto the balcony, throw a nade out there and then walk out just as it explodes. If you time it right the nade should have stunned him and you can get the easy kill, sometimes you can even kill him with it
If you do it the "regular" way then he hops down, gets in a car and a bunch of other people start to shoot you and then now it's a car chase.