Some pointers based on a stroll down Haight Street last Friday night…
Subtle use of a fog filter can provide a dreamy image that evokes romance or mystery.
Complimentary eye and clothing color is a winner for high-key fashion portraits.
Hats can make a classy gal even classier. A slightly exaggerated tilt will avoid facial shadows.

Shooting lingerie in black and white is a true sign of sophistication for any photographer.

Fashionable eyeglasses, if shot correctly, can draw attention to beautiful eyes.

Have your subject focus his attention on something outside the field of view to create a feeling of candidness and intrigue.
And lastly, tasteful post-processing using a bit of tone mapping and HDR can bring out shadow details without losing a sense of realism.
Best post yet.
Good models! They sure know how to stay put for those low light situations.