Early Winter Special, Get 50% Discount Sirenis Hotels And Resorts, Dominican Republic. Discover the Beauty centre of the Sirenis Cocotal Beach Resort Casino & Aquagames and take time to relax. Book your vacations now and get 50% discount. Terms & Conditions: Type of Room: Double Room. Special offer valid until 31 July, 2016. Stays period is from 1 November 2016 to 15 December 2016.