Waltham Ham - A - Rama

Every year at about the same time a pepto-bismal pink colored sign for the "Ham - A - Rama" materializes at major Waltham intersections. I'm not sure exactly what this intriguing event is, but I figure it involves eating lots of ham. What makes it a "Ham - A -Rama" though, instead of just a ham dinner? I wish I knew.

I guess I better check it out some time.