I don't have a name for this drink, but a coworker came up with it while traveling for business.   I'm guessing a bit at the proportions so if anyone tries this and has a better idea, please let me know.

Pour into a tumbler with ice:

4 oz. chocolate vodka
4 oz. Chambourd

Top off with ginger ale.  I recommend Vernor's, just on principle.

The amount of alcohol might be off.  It was about a 50/50 mix but my original impression was of a slightly taller glass, and she held her fingers 3-4" apart and said "about this much alcohol" total.  Could be four ounces total, could be somewhere in between.

Actually, let me amend what I said above.  If anyone who has a good sense for the balance of ingredients in a cocktail, with or without tasting one, please let me know.   Maybe someday I'll tell you about the dangers of empirical reverse engineering of cocktails, but for now just trust me and don't try too hard to find the flaws unless you've got a knack for it.