This 100% silk jumpsuit from Jesse Kamm (orig $970, now $391) has the look of a flight suit or uniform which I like. Features an elastic waistband and removable belt. Wear it with heels for a modern polished look.
More on the budget side is this synthetic/spandex jumpsuit from Express ($79.50). Great going out look for summer. Wear it with strappy heels and a little clutch.