Have you lived in Singapore long? Never been out of the house? Have you joined any of the many many casual fashion shoots here on CS? Have you checked the P&P section and seen the locations listed there?
If you think photo shoots are easy then think again. Unless, it's just camwhoring.
I don't see the point in asking others for locations that are EASY and FAST, only you can find a place suitable for your own needs. You're the photographer anyway, our suggestions might defer from yours.
TS: Instead of waiting for spoonfeeding you can browse through the Gallery sections here. Plenty of pictures, plenty of styles, most are casual (the opposite of 'formal'). Get ideas from there, compare with what you have in mind (we can't see what you have in mind), check where you live and how you get to the location. Go and shoot.
Keep in mind: Not the camera will make you a photographer suddenly. The first thing is the idea.