Children only - no adults

You may have a party that only has the space for the children to attend and you don´t have room for the parents to stay:

Child dressy tea party at a restaurant
Child dress up party
Child laser tag party
Child pizza making party

You can note a "Drop off at 1:00 and Pick up at 4:00" or you can say, in smaller letters on the bottom, "Children only please" or "Facility size limitations - children only please".