Movie was about a group of young people trying to get from one end of New York back to Coney Island.. I think. Along the way they have to go through all these different gang territories. There was a gand who were all on roller skates and an all girl gang and several others. At the same time there was some big gathering in a central location -maybe Central Park where some black guy was preaching to all these gang members. The whole movie took place at night. There were no notable cast members that I know of. Anybody have any idea?

Easy one! That's The Warriors (http://www.imdb.com/title/tt0080120/) from 1979.

Thank you!!