Photo: Patrick Andersson

A: I agree: It's more modern to mix day and evening clothes, and more practical (who wants to schlep a dress bag to work—or go home and change?). It's also cheaper—a sparkly top to layer with office basics needn't be a big investment. After 5, retreat to the ladies', switch to dressy accessories and vivid lipstick , and you're transformed.

See two outfits Adam loves for day-to-night dressing