The definition on Wikipedia is:
Entertainment is an activity designed to give people a diversion. It is usually conducted in one's free time. An audience may participate in the entertainment passively as in watching opera or a movie, or actively as in games.
I figured that Luminara is quite entertaining. This happened last Saturday. All of the lights and entertainers are fun to watch. I'm pretty sure (sarcasm) that's entertainment.
The crowd being entertained.