Expect Philly fashionistas to serve looks and sartorial drama this Friday at Philadelphia Fashion Week’s Avant-Garde Ball. The deluxe cocktail party will feature live models strutting in deliciously decadent special occasion wear by up-and-coming couturiers Moerder Chains, Tim van den Heuvel, Conrad Booker, and Project Runway All Star alum, Prajjé Oscar. The three-hour affair will…