While it appears zombies possess the ability to amass in significant numbers virtually anywhere, common locations appear to be large open spaces such as fields or farms or parking lots. The debate still rages as to what attracts zombies to these areas. Many feel it is for food although it is difficult to know if the zombies uses any senses seeing as how they are supposed to be dead. Do their eyes see? Their noses smell? Their tongues taste the flesh they so vehemently crave? (Dr. Genuine has often been heard to remark: If a zombie were a vegan in its living stasis, does it remain so upon the transformation?)
But I digress.
The question remains posed. Why do zombies congregate?