Originally Posted by tentseller

No need for a formal hotel room reservation for a one day turn:

With DL's late arrival just book a 6 hour block at the Changi T1 Ambassador transit hotel. By the time you are done with the 6 hours plus a shower, you will be at 7-8am so grab the SMRT train into town and start your food adventure. I never waste my money or points on one night of hotel with DL's late arrival when I go to SIN.

Check in opens at T-h which is about 3am. So hang out around town, by the time the partying and eating is done it will be 1-2am. Some of the night market is open all night with sight and sound plus food to keep one amused. Freshen up at the lounge prior to departure.