Bill Clinton may be the only attendee in slacks at Tina Brown‘s Women in the World Summit, which kicks off Thursday at the Hudson Theater. Brown’s second annual gathering of female power players will bring Condoleezza Rice, Madeleine Albright, Diane von Furstenberg, Melinda Gates, Christiane Amanpour, Barbara Walters, Lesley Stahl, Sen. Kirsten Gillibrand and Cherie Blair for two days of panels and conversations. The former president will headline the event with his wife, Secretary of State Hillary Clinton.