LEWISTON — The Franco-American Heritage Center, in consultation with its partners at Bates College and dancers who had been scheduled to perform Friday, Feb. 8 as part of the F.A.B. Winter Dance Showcase, have postponed the performance until Saturday, March 2 due to the impending storm. The Franco Center box office will be closed on Friday as well. Tickets for Friday’s postponed F.A.B. show will be honored on March 2.