This next craze is for all those superhero travelers. Hilton has just launched new fitness rooms that have a mini gym inside the hotel room. They're called Five Feet to Fitness, and include a fitness kiosk, a touchscreen display with workout routines, and all kinds of fitness tools. A guest could do yoga in the morning, then come back from a stressful day to a bike ride. The fitness rooms are available in San Francisco, and are coming soon to Atlanta, Chicago, Austin, Las Vegas, New York and San Diego.