With shouts of "Fidel si, blockade no," hundreds cheered Sunday night as Fidel Castro entered Harlem's Abyssinian Baptist Church. On his third visit to the U.S. since coming to power more than 36 years ago, the Cuban President is receiving a warm welcome. Although President Clinton is officially avoiding Castro, the 69-year-old Cuban president and former rebel was not hurting for invitations during the U.N. celebration. "Gorbymania, it seems, has given way to Fidelmania," reports Miami bureau chief Cathy Booth. Among those putting out the welcome mat for the Cuban leader: The Council on Foreign Relations, TIME Magazine, U.S. News & World Report publisher Mortimer Zuckerman and a New Jersey woman who invited him to a family cookout. The invitations will have to be local, though. By the conditions of his visa, Castro may not travel more than 25 miles from New York's Columbus Circle.