Man, I went to the park right after this was posted (okay, about an hour after), and there were no naked girls and no slip and slide. I found two very large blocks of ice, though.
My understanding is that slip and slides are incredibly dangerous to adults. Something about friction, inertia and paraplegia.
I insist that you go explain to those ladies how dangerous their behavior is! Explain it at length, if necessary. Consider offering them alternative entertainments to replace the loss of their slippy slide.
