A popcorn bar at a wedding is a great way to dazzle your guests and treat them to something different. Since the popcorn bar at weddings comes additionally to cake, sweets, and other food, you will not need so much of it. To create a popcorn bar designed to serve 100 guests, you will probably need 2 cups or small boxes of popcorn per adult guest.
So, the amount of popcorn you will need for 100 guests is around 200 cups of popcorn boxes of a small size.
For example, you can order four 4-gallon bulk bags of differently flavored popcorn. Then, divide them into custom-made boxes, bags, or cups to serve on dessert tables, hand them out as favors at your wedding, or use them as welcome gifts at your reception.