How many 2 liters of soda for 15 people?

For a gathering of 15 people, a general guideline is to assume each person will consume about half a liter of soda. Therefore, you would need approximately 7.5 liters of soda for the group. This translates to about 4 bottles of 2-liter soda, ensuring there's enough for everyone. Adjust accordingly based on your guests' preferences and the length of the event.