Final answer:
A parent-member banquet should typically not exceed 2 to 3 hours in length to maintain guest engagement and enjoyment.
Step-by-step explanation:
The optimal length of a parent-member banquet can vary based on the type of event and the preferences of the organization. However, as a guideline, a banquet should typically not exceed 2 to 3 hours in length. This time frame allows for a welcome period, meal service, any speeches or presentations, and social mingling without being overly long, ensuring that attendees remain engaged and the event remains memorable. Planning should take into account the schedule of events, and the needs and comfort of the guests to make the occasion enjoyable for all participants.