I like the airy look of this chiffon blouse with wrapover draping at the front. The long sleeves add a touch of elegance, along with the button at front. This is simple yet sophisticated, and perfect for your 9-to-5, as well as after-hours. This blouse is $29.95 at H&M!
Other alternatives to this type of draped blouse include this wrap blouse from Shopbop, or this crossover front panel.
The Corporate Sis.