I am a high school student - a junior - who has been recruited to play background music for the Graduating Seniors' Class Night. I normally play Jazz and Ragtime music on the piano so I don't really know where to start to find some simplistic, subtle, and sentimental background music for such an occasion. The Class night is an event for family and their graduating students to come together and award various things/"cross over the bridge." I will be playing under an announcer. Please, give me some suggestions on some music I can play that is subtle, pretty simple (It's not a concert and I have limited time!), and appropriate for this event, thank you!