No matter how small or easy an event may seem some forethought and planning is always required. It is important to know the policies and procedures that may apply.
There are several offices on campus that are able to help student groups plan and run an event. Additionally, the Campus Activities Complex distributes a very useful guide for event planning at MIT, also available in printed form from their office.
Many events are required to be registered with various on-campus offices and in some cases with the City of Cambridge.