ADMITTED. AL GOLDSTEIN, 57, publisher; to the National Press Club; in Washington. By being allowed to join the ultimate Establishment journalists organization, the puckish creator of the bluntly pornographic Screw magazine has been put on an equal footing with reporters and editors from the New York Times, the Washington Post and other more conventional publications. The move is deeply offensive to some club members, but Goldstein's papers were in order, and he had found the required two sponsors.