Any tips for photographing in a film noir style?

I think of elaborate costuming, glamorous hair and makeup, dramatic lighting, and cynicism and sexuality. How you translate that into photos is going to be up to your own creativity.

High-contrast black and white lighting. Dramatic poses between people—one in the foreground looking away, another in the background staring at Person 1’s back. 40s hair, structured clothing, sharp suits, metropolitan sets.

What @syz and @KTWBE said, plus:

Light the background & subject separately – move them 5 or 10 feet away from a wall, for example.
Spotlight the subject using specular “hard” lighting, rather than diffused soft lighting.

I Googled “Hurrell” for examples:
http://ultraorange.net/media/2007/10/art-george-hurrel-sherilyn-fenn-1993.gif
http://www.mikecraver.com/Tierney_by_Hurrell.jpg
http://www.soulcatcherstudio.com/exhibitions/nude/hurrell.html
http://images.artnet.com/artwork_images_425931459_519123_george-hurrell.jpg

Try doing some silhouette shots, too.

You might also pull stills from classic film noirs like Maltese Falcon and They Live By Night for ideas.

Good info above.

Film Noir is famous for Low-key lighting, going for the chiaroscuro effect.