What to do at my college graduation Party?

My sister just graduated from highschool and I just graduated from college. My parents are throwing us both a luau themed party together. Many of the people attending will be from our church, as well as some of our own friends and family. There will be plenty of food and music. What Id like to know is what should we do to make it a fun party? Are games appropiate (e.g relay race, hula dancing)? I just dont want the guest to be bored. Thanks for your input.|||Games would be fun, along with tequila bloody marys coronas guiness and more beer