What possible data products can be built using this dataset
You might be able to find individuals that act as anchors.  That if Abe is here, then everybody else is more likely to stay longer. Interesting to know if it was always the same people who stayed or not.

There might also be some interesting patterns with groups that arrive, are present, or leave together.

As a business owner you could look for individuals who not just work shorter hours, but arrive at their own time, and leave with a group.