Johnny Jet recently got to attend the most exclusive lounge at LAX this week. It's $4,500 a year membership, plus $2,700 every time you use it. You get separate security, you have a private room, much like a hotel room, and you're even driven to the airplane for a backdoor entrance. It's designed for heads of state, business leaders, and celebrities. But they're about to do a deal with United Airlines, which will offer the same service for $375 per party.