Time for a party . . . or prisoni

RON Perelman’s annual summer party. Jennifer Lopez will perform. Her future intended Alex Rodriguez will accompany her . . . With our prison system OD’ing on O.J., next out might be lifer Charles Manson. From behind bars this aged and inf irmed murderer is — pardon the phrase — calling the shots on exactly what he’ll say or do on a TV interview he’s already OK’d.