City of Grosse Pointe Park issued the following announcement on Jan 12.
Just a friendly reminder form your Public Safety Department.
The schools are considered private property, this includes fields and playgrounds. If a complaint is made by the school, you could be issued a violation for having your dog on the property.
Please be mindful of their droppings, pick up after your pet, many children and residents use these grounds.
Original source can be found here.