It seems like you have done almost everything there is to do during the day. Little India is interesting and has good shopping (though nothing branded) especially at Mustaffa's. If you want to do Little India, just don't go there on Saturdays and Sundays as it will be really crowded. For people watching, you might want to do it in Chinatown. Quite a number of cafes have mushroomed on Trengganu Street (which has now been transformed to a pedestrian mall). But then a again, the ultimate place to people watch is still at Satrbucks at Liat Towers, and the Coffee Bean at Promenade, both of them down Orchard Road.

If you don't want to do the city, from where you are staying (probably the Le Meridien Changi), you are just a short walk away from the boats that take you to Ubin Island. Ubin is pretty much a nature reserve with biking tracks and a small village and quite quaint actually. It's a great place to go bike riding and getting away from the crowd. Also in Changi Village, where the hotel is situated, there is a small market, food centre (that's got some pretty OK and cheap food) and an institution call Charlie's. It's a cafe/outdoor pub that is just behind the market. He has quite a selection of beers and pretty decent grilled chicken wings. It gets really going after 6pm.

What dates will you be in Singapore?

Edmund in Singapore