Final answer:
Groups celebrating an event should be seated in a designated area that can accommodate their size, allowing them to sit together and interact comfortably.
Step-by-step explanation:
Groups celebrating an event should be seated in a designated area that can accommodate their size. This area can be a separate section of a restaurant, a banquet hall, or an outdoor space. The seating arrangement should be arranged in a way that allows the group to sit together and interact comfortably. For example, tables can be arranged in a U-shape or a round table format so that everyone can see and talk to each other.