You can learn a lot from working, especially people skills. When you have nothing to do, be more proactive, go and ask people if there's anything you can help with, they will appreciate the extra pair of hands. And do you get like a staff badge or "I'm here to help" badge so guests know you're part of the team? It helps to break the ice with guest, sometimes they want to know more about the place and you're the perfect person to talk to.

Enjoy!