20. The Principal Cardholders of Citi Prestige Card issued by Citibank (“Eligible Principal Card”) will enjoy one complimentary fourth night with no black-out dates, when booking four consecutive nights at any hotel booked by Citi Prestige Concierge (“Citi Prestige Concierge” is operated by a third-party service provider) (“Complimentary Night Offer”). Bookings made through other methods such as, travel agents, websites or directly with a hotel will not qualify.