Long Stay Deal: Save Up To 17% On Best Available Rate Dorsett Singapore Hotel. Book your stay for a minimum of three nights or more at Dorsett Singapore Hotel and save up to 17% off the best available rate. Terms & Conditions: Period of booking & stay: Now until 29th December 2016. Minimum stay of 3 consecutive nights is required. Blackout dates apply. This promotion cannot be used in conjunction with any other promotions, discounts and vouchers.