Along with the mod style, it was acceptable to wear a dressy suit to cocktail parties, and for women going directly from cocktails to dinner, a matching jacket could be worn over a dinner dress.

Consisting of a tailored jacket (ideally one that’s not part of a suit) and non-matching pants, the sport coat and trousers combo can do you right in a wide array of formal and semi-formal ...

denim jacket. You can go denim-on-denim for a modern Canadian tux or stick to pleated pants and dress pants. It's less formal and stiff than a suit, but it's intentional. And then, of course ...