If you want to give your credit card some exercise, head out to Joo Chiat Complex in Geylang. Why not take a stroll along the marina and watch the sunset while you're here? It's also full of great shops and restaurants, so you can spend the afternoon having a wander. Splash some more cash at Geylang Serai New Market, Paya Lebar Square, and Tanjong Katong Rd.