I would plan to visit the Orchid Garden, do some window shopping on Orchard Road, spend a little time on the river, maybe do a boat tour. Have a beer at Boat Quay, or Clarke Quay, go to the Battle Box in Fort Canning, and eat, eat, eat!!
I saw a show just last night about Laksa that looked just GREAT at 51 East Coast Rd. Not a difficult cab ride from the center.
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I had 36 hours in Singapore en route to Oz over Xmas/New year.
Agreed it's not as buzzy and interesting as Bangkok or HK but still enough to do. The zoo is good, there's a cable car ride over to Sentosa Island, Raffles (for way overpiced pre mixed slings), take the lift to the top of the Marina Bay Sands hotel for the view (or even better stay there so you can use the infinity pool).
We took the open top buz around and jumped on and off at will. Might be a good option in s hort amount of time. Food we found was fine, just get off the main tourist drag.
It wouldn't be my first choice of place to visit, although it was a handy stop-off on a round-the-world trip. To answer your question, it depends what is your sort of thing (apart from pork eating!). My wife and I, before the kids, had a great time wandering around the botanical gardens, which had an outstanding orchid display - it enjoyed wandering around, but I appreciate it isn't everyone's cup of tea.
Talking of tea, we had a fabulous afternoon tea at the Chihuly Lounge at the THE RITZ-CARLTON, MILLENIA SINGAPORE - we both love afternoon tea, and really like this glass artist's work, so it was a great afternoon.
Enjoy the trip.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to move" Robert Louis Stevenson
Sure it's sterile, but you don't have to set up home there! I really like Singapore. Another vote from me for the botanic and orchid gardens. Sentosa is great if you turn off your kitch chip, especially the foutain show! A sling in Raffles is not worth it IMHO (About the only positive is that you have done 'it', but unfortunately 'it' is disappointing). Boat quay has a nice feel for something to eat in the evening, a food hall at lunch time is an absolute must (any likely looking hall you come across). Orchard road is OK if you really feel the need for retail therapy, but the prices are not that great these days and the range is generally(with some exceptions) very international. And remember you are very, very safe so walk, walk walk and get a feel for the real place.