To further cusomize to your event, your party can become a training exercise without anyone knowing it. Or maybe education about the family history. Just supply us with questions about the company/family or the about the industry or any topic you wish. Your guests will learn while having fun. It's great to watch what happens when a contestant should know the answer but can't remember.
Put teams together. Accounting vs Payroll, Productions vs Management, 1st shift vs 2nd shift, Brides family vs Grooms family.