Met Gala stars primp at this exclusive hotel. Text to be rewritten - preliminary While the different sections of Lighthouse Beach on Fire Island have the greatest number of people who are using the beach clothing-optional, there are a number of other clothing-optional beaches on Fire Island. The 1st dune crossing is part of a self-guided nature trail, and the 4th dune crossing is part of a town mooring area. Share on Facebook Share on Twitter.