I'm no expert, but I think they descend from the daytime equivalent of formal eveningwear (the name of which escapes me at the moment). But either way, I agree: Single button, flap or jet pockets is best. Further, whereas on a notch lapel jacket, single or dual vent is a matter of taste, for peak lapel I think dual vent has a vast, universal superiority.
City Dress - Black jacket with cashmere striped trousers
That particular jacket (contest stitching, ticket pocket, etc.), that tie (ugh), that color trouser with that jacket, etc. I understand that Butler knows what he's doing, but my personal opinion is I've never seen him look worse. In other words, that's not my style. [/quote]