Ali Wentworth: The city's new social "It" girl, Wentworth, 44, learned a lot from her mother, Mabel "Muffie" Cabot, who served as Ronald Reagan's social secretary. Case in point: "Seating is important -- making everyone feel important and integral to the event." But she disagrees with her mother when it comes to working the room with her husband, ABC chief Washington correspondent George Stephanopoulos.