Looking for a specific peice of jukebox software for partys

Heya MR, if anyone can help yall can.

I'm throwing a party tonight, and I have my mac set up, beer pong, etc.
I want people to be able to walk up to the mac, and put a song in queue, but I also want to keep people out of the other parts of my mac. Is there any jukebox software, maybe that merges with itunes and allows people to check out the music, but not be able to snoop around in my computer file system? The iTunes DJ thing is nice, but... not secure. I know it seems I'm being paranoid, but I've had people go on my mac and delete **** before. Alright thanks.