Some guests may bring friends, too
You might also observe that in addition to bringing presents, some of the guests have invited additional people to join them for the supper. Bringing along more guests is frowned upon in Western culture since hosts often prefer to have an accurate headcount in order to prepare the appropriate amount of food. However, Indian hosts are warm and kind, and they like entertaining guests.
Dinners are often served in a family-style setting, so it is simple to make adjustments so that they can accommodate a different number of diners.