If they aren't currently intoxicated, why can't the alcoholics come into the park? I suppose this was supposed to say "No Alcohol" or "No Alcoholic Drinks."

Operererererated! It was difficult to find this error because it is difficult to read this sign. It looks as though the "i" in service was an afterthought. (You may have to click on the picture so that you can see an enlarged view in order to read the words.)