So a Late-Over is like a slumber party, only when it's time to go to bed, the kids all go home!!!
Parents rejoice. This is a thing. You're just making sure the kids are all entertained and hopped up on sugar before bed time, and then you send them home to their own mommies and daddies, and you can get a good night sleep. Sounds too good to be true.
No late night stomach aches and sending kids home.
But you can still set up sleeping bags and watch movies, eat pizza and everything.