For 100/40 Guests Aim for around 15-20 large pizzas. Accompaniments like subs, salads, desserts, and drinks enhance the spread. The actual count will vary based on the demographics of your guests. For instance, gatherings with more children or seniors might require fewer pizzas. For 60/20 Attendees Roughly 10-15 large pizzas should suffice, especially when supplemented with sides and desserts. If solely offering pizzas and beverages, consider increasing the pizza count.