The Warriors (from what I remember of it) was really a parody of 70s gang life in NYC. No, they didn't wear makeup or skate around, but they did dress flamboyantly with cut sleeves, motorycle vests, boots, huge-brimmed dress hats, bandanas, excessive jewelry, and backwards swastikas.
I'm on my break now, so I can't access You Tube. Check the documentary 80 Blocks from Tiffany's - features Black Spades, Savage Nomads, and Savage Skulls. Those were the crews that gave inspiration to The Warriors.
And yes, there were real life brawls at Coney Island.