Here is the save: https://www.dropbox.com/s/30p7dg5dsv91tyr/Dine%20Out.zip?dl=0
At this point in the game, I disallowed new customers at 10 PM. A couple of strays whose parties were already dining showed up. And then around 11 or 11:30, Aleah Jennings and Tina Fournier showed up. I originally thought they were one party, but they were seated separately and then around midnight their partymates showed up. But they should not have spawned after disallowing new customers since none of the other party members were at the restaurant or even in the general vicinity (I watched them materialize from thin air).
Side note: I think this may be a separate bug, or perhaps as designed, but the disallow new customers setting apparently does not save with the game. So if I disallow customers, save my game, exit, and then reload, I have to disallow new customers again.... So when you load my game, you will have to click the podium and select "disallow new customers" for that setting to take effect again.