I've done that many times, though always in the same way. I basically "borrowed" (OK, stole) the idea from the pages of GQ- if you're a loyal reader, you've probably seen a number of instances in which various people- especially designers, like Tom Ford, Helmut Lang, Hedi Slimane, etc.- wear that look. I thought it looked great, so I use it now and then. Like them, I wear a black blazer over a white button-down, french-cuff dress shirt, open at the neck. I wear that over my favorite pair of Diesel jeans, with Kenneth Cole ankle boots. The look is actually more versatile than you might think. It can be worn to all sorts of dinners and parties (not real formal, of course), to go shopping downtown, on dates, etc. Looks very stylish and cool, but not too fussy or formal.