Early Winter Offer, Save Up to 30% Sirenis Hotels & Resorts, Mexico. Take the advantage of Sirenis Hotels & Resorts,Mexico early winter offer and save up to 30% discount on staying at their hotel at Grand Sirenis Riviera Maya Hotel & Spa 5. Terms & Conditions: Room Type: Junior Suite. Offer valid until 31 July 2016. Stay period is from 1 November 2016 to 15 December 2016.