Robbery may not be the main reason for a camera. Having a video of any incident that happens (broken equipment leading to injury, angry parent, etc.) would be valuable.

It's the Marcus Jewish Community Center of Atlanta.

Jewish Community Centers are targeted more for attacks than a YMCA.

Vandalism.

Looting is done for fun too. It must suck to have kids show up for practice in the morning and some of the essential gear is gone. It doesn’t matter if it is inexpensive to replace, you still have to cancel class and take a day or two up replace it, file a police report, etc

Possibly as a deterrent to a child (or adult) going through clothing/bags and stealing mobile phones while the owners are exercising.

School shootings?

here its mostly mobile phones.