I'd say never plan on a "perfect" party, because there's always something that will go wrong, but with this luncheon, plan on an "intentional" time getting to know your neighbors, who may some day end up being some of your best friends!
These are good ideas! We have lots of new neighbors on our street now. Tips for how to meet your neighbors and develop that true "neighborhood" spirit. She started with an ice cream social in the driveway!