Offers and Promotions DBS/POSB Card Offer at StraitsKitchen: 15% Off Lunch and Dinner Buffets at Grand Hyatt Singapore, Until 30 Dec 2026 DBS and POSB cardholders can enjoy 15% off lunch and dinner buffets at StraitsKitchen, Grand Hyatt Singapore, until 30 December 2026. Reservation required, and some dates are excluded. Nov 6, 2026