FIFTY years ago the Waikiki beach boys were the suntanned demigods of Honolulu’s palm-fringed shores. After the first major resort — the Moana Hotel, now the Moana Surfrider — opened in 1901, organized beach service began on Waikiki. The beach boys came to act as instructors, lifeguards and entertainers, spreading the gospel of surfing to dreamy-eyed tourists of all ages.