Leisure For Longer: Save Up To 25% Off Booking At Millennium Hotel, U.S. Leisure for Longer allows you to save up to 25% off the best flexible rate when you stay for three nights or more at any Millennium hotel across the U.S. T&C: Valid for booking and stay: Now until 31st March 2016. Minimum 3 night stay required to apply the offer. Offer is subject to availability at participating U.S. hotels. Savings quoted is based on the best flexible rate at point of booking and may vary by hotel. Book Now.