https://marriottmembersdinemore.com/3xoffer-singapore
Whether you're staying with us or stopping by for a meal, treat yourself to
3X points* for every US$1 you spend on delicious local cuisine.
Simply present the special offer email to your restaurant associate at participating restaurants
from 10 January until 10 February 2019 to enjoy this limited-time offer.
It also says 10% F&B discounts for general/silver members, 15% for gold, 20% for plat.
Participating locations in SIN seem to be at the JW and Mariott Tang Plaza
NOTE: also a few in HKG and BKK for those attending the appropriate pre/post DOs