There’s more than meets the eyeliner to Miami. A surge in downtown growth finds the city minding its business in the heart of the financial district. Enter the new Conrad Miami, with 203 work-wired rooms, 300-thread-count linens, and spacious marble baths. After five, head for the hotel’s glassed-in 25th-floor “sky lobby,” where a sleek restaurant and bar do for urban sophisticates what South Beach does for singles.