A visiting Rotarian from Calabar, Nigeria, discussed on Monday how members of the international service organization were helping to meet challenges of life in his country — including the unmet goal of Polio eradication. Henry E. Wilhams, a Rotarian for 30 years, spoke at Monday’s meeting of the Brooklyn Heights Rotary Club. Monday marked the club’s final meeting at the Park Plaza Restaurant; beginning next week, members will gather at the NY Marriott Brooklyn Bridge, on Thursdays from 6 to 7:15 pm.