HOWL by Allen Ginsberg

I saw the best minds of my generation destroyed by madness, starving hysterical naked,
dragging themselves through the negro streets at dawn looking for an angry fix, angelheaded hipsters burning for the ancient heavenly connection to the starry dynamo in the machinery of night,
who poverty and tatters and hollow-eyed and high sat up smoking in the supernatural darkness of cold-water fiats 'doating across the tops of cities contemplating jazz....

And so on... It's way to long to post. "America" is another really great one he wrote.