You'll be feeling hot, hot, hot in Miami Beach, which is not to be confused with Miami. Miami is the city. Miami Beach is, well, the beach, and you have to cross the causeway to reach the barrier islands. And when you do, palm trees, neon lights, fast cars and beautiful people will keep your head spinning.
Spend time spinning on the dance floor while you're at it. There are nightclubs aplenty, and they are perfect for burning off the calories consumed at one of the decadent Latin restaurants sprinkled about the city.