I have a D70s Nikon and have shot parties, family, scenery, people, places. Here is what I own and the approximate usage of each lens:
Nikon Zoom Lens - AFS Nikkor IF 18-70mm G ED 6,000 shots total
Nikon Zoom Lens - AF Nikkor IF 70-300mm D ED 50 shots total
For indoor shots, a wide angle zoom lens will work fine - 18 to 70mm or in that range is a good all purpose lens. Go for it.