Pay for 3 Nights And Get 4th Night Free, Desire Pearl Resort & Spa, Riviera Maya. Book Early and get Best Deals. Pay for 3 nights and get 4th night free & the Spa Treatment 25min massage per person per stay. Promo code:1PEARLM. T&C: Book before: October 30th, 2015. Travel from: January 2nd to June 30th, 2016. You have to stay minimum 4 nights to get The 4th night free & the Spa Treatment 25min massage per person per stay.