If you want to give your credit card some exercise, head out to Shipra Mall in Indirapuram. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.
If you're planning a bit of sightseeing head to ISKCON Noida— just one of the monuments located 8.3 mi (13.4 km) from the center of Delhi. You could also start your cultural experience by heading over to the art galleries in the area.