A few towns have them, but most don't.
They're curfews for borough parks and playgrounds. In some towns, nobody is permitted in parks and playgrounds after a specified hour.
Such curfews are a great idea. They help prevent vandalism and cut down on such activities as drug use and other crimes.
We've been to playgrounds and have found condoms, litter, and graffiti. Admittedly some of this could have occurred in the daylight hours, but certainly the night is when isolated playgrounds and parks offer a convenience for gatherings of unscrupulous individuals.