In such works as “Less Than Zero” and “American Psycho” Brett Easton Ellis brilliantly dissects contemporary American society, a culture in which too much is never enough. Now, adapting his own acclaimed novel for the screen, he returns to the Los Angeles of the early 1980’s with a multi-strand narrative that deftly balances a vast array of characters who represent both the top of the heap (a Hollywood dream merchant, a dissolute rock star, an aging newscaster) and the bottom (a voyeuristic doorman, an amoral ex-con). Connecting all his intertwining strands are the quintessential Ellis protagonists—a group of beautiful, blonde young men and women who sleep all day and party all night, doing drugs—and one another—with abandon, never realizing that they are dancing on the edge of a volcano. Filmed with uncommon glamour and grit by acclaimed Australian director Gregor Jordan (“Ned Kelly,” “Buffalo Soldiers”), “The Informers” is an alternately blistering and chilling portrait of hedonism run amuck