NEW YORK — “Good can triumph over evil if the angels are as organized as the Mafia.” That was Bob and Harvey Weinstein’s motto when they founded Miramax Films. And the Weinsteins invoked the quote — from Kurt Vonnegut’s “Cat’s Cradle” — once again Tuesday when they were honored at the “Marvin’s Room” premiere benefit for the Robert F. Kennedy Memorial.Upon accepting the award, Harvey Weinstein told the crowd that his father, Max, taught his sons “how to withstand the blow and how to deliver one.” Vice President Al Gore brought Gotham’s rush-hour traffic to a standstill as he traveled to the Cineplex Odeon Ziegfeld for the preem, where audience members made contributions to the RFK Memorial National Juvenile Justice Project. Among those attending the screening and dinner afterward in the Waldorf-Astoria Hotel’s Starlight Room were “Marvin’s Room” cast members Diane Keaton, Robert DeNiro and Gwen Verdon, director Jerry Zaks, producers Scott Rudin and Jane Rosenthal and singer-songwriter Carly Simon. Representing the Kennedy clan were Caroline Kennedy Schlossberg, RFK’s widow Ethel Kennedy and Kerry Kennedy Cuomo. Also attending the benefit were Glenn Close, Harvey Keitel, Sally Jessy Raphael and Kenneth Cole.