Fire Island has been inhabited by pirates, whalers and the Coast Guard. Today, its population is just as diverse. Distinct but overlapping communities welcome young singles, families, moguls and regular Joes. All vacationers agree that the absence of cars and proximity to the water are the prime attractions. Then there are restaurants, clubs, shops, historical sites and natural wonders galore. Here is a guide to vacationing in 7 of the island's most popular communities.