Not to get all George Carlin on you, but you know what you don't hear a lot about anymore?
When I was a kid, my parents were always (or, at least twice a year) getting dressed up to go out to a Dinner Dance, usually of the corporate (environmental engineers party hard!) or synagogue function (jews party harder!) variety.
I have never, unless I've blacked it out, been to a Dinner Dance. Do they still exist?