Girls just wanna have fun - even the President's daughter. Barbara Bush put on quite a show when she stepped out Wednesday night with her "very good friend" Fabian Basabe, a preppy party-hopper dubbed one of the city's most eligible bachelors. They hit the dance floor at a swank soiree for fashion designer Jennifer Nicholson (daughter of Jack) at the Chelsea hot spots Sette and Viscaya. First Daughter Barbara wore a flouncy, cleavage-baring slip dress over jeans and high heels, while Basabe, son of an Ecuadoran businessman, had on a sweater and polo shirt. The 21-year-old Yale senior - who...