According to the Parks Dept. website, a permit is needed if more than 20 people are expected to attend. A permit costs $25, and takes 3-4 weeks to process. I've picnicked (in small groups) in both Central Park and Prospect Park (and seen plenty of people doing the same), and there's never been a problem. I personally don't think it would be a problem without a permit, but I know others may be more concerned. I also don't think it would be a problem to apply for a permit if the response for this is overwhelming.

What do others think?