Potlucks are great ways to get to know your neighbors, co-workers, and others around you while sharing good food.  They can usually be done on short notice, and tend to provide more than enough food for everyone who comes, even if a few folks don't have time to prepare dishes.

Organizing a potluck can be as easy as picking a time and place, but you can also play around with the idea by having themes, trying to make dishes from local ingredients, etc.