Its a free pitch and putt, just show up and play, not going to get better value than that! The greens are not really playable, and most of the time you’re hitting out of high grass. Essentially its a spot in the park where the grass has been mowed a bit more. Great place to practice some short game, or playing out of the rough.
If you’re a beginner this is a good way to get used to playing on a course without having to spend money on green fees.