None as long as it is a small one. There is no outdoor cooking...
None if it is on the reasonably quiet side and doesn't bother other people.
Free
WELL, I REALLY DON'T HOW MUCH MONEY YOU NEED TO MAKE A PARTY THERE SINCE IT IS A PUBLIC PARK. NEITHER I KNOW IF THEY RENT IT..
You will need a permit if it's a fairly large gathering
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