I tend to agree with high country, the kit lens may do what you want, and a speedlight, set on fill flash, will give you a pretty natural look. A prime will make you move in or out for the zoom. Take a look at a Tamron 17-50mm f2.8, great low light capability.

Great photography is not about being in the right place at the right time, it is about putting yourself in the right place at the right time.