Matthew J. Lee/Globe Staff

For the past eight years on Columbus Day, Chiro Zottola has hosted family and friends to celebrate their Italian heritage with homemade pizzas. “We’re always looking for a reason to invite friends over and cook pizza, cook food, eat, and have a good time,” says Luigi “Lou” Giovanetti, who co-owns a cluster of buildings on Moody Street in Waltham with Zottola and Zottola’s brother Mario.