Worthy of George Clooney's character in Up in the Air, Cathay Pacific Airways's 48,000-square-foot Wing Lounge boasts an 80-foot long cocktail bar, a noodle bar, cabanas with private baths and showers, and even a library. Business travelers can catch up on work in private cubicles. To enter the lounge, you'll need elite mileage status with the oneworld alliance, which includes carriers such as American Airlines British Airways, a First or Business Class ticket with Cathay Pacific or its subsidiary, Dragonair, or Executive Platinum or Platinum status with the American Airlines' AAdvantage program.