A photograph sent by a friend said it all. Visitors to Indian Wells Beach in Amagansett about an hour before sunset Saturday would have been treated to a mountain of garbage overflowing the metal bins and left haphazardly at the head of the parking lot. Looking closely at the photo, the preponderance of beer cans and empty cartons is apparent — most are Coors or Bud Light, which for some reason is the beverage of choice for the Indian Wells groups. A couple sits on a bench, taking in the evening air, just a few feet from the groaning bins.