Early voting is underway in Miami, Miami Beach, Hialeah and Homestead. Voters in Miami and Miami Beach are deciding the fate of borrowing and booze. Miami wants to borrow hundreds of millions of dollars for the environment and other items. Miami Beach will decide if there should be an earlier last call for alcohol on a stretch of Ocean Drive for outdoor bars. Both ballot referenda are economic questions that focus on two fundamental issues in South Florida: hospitality and flooding. One is