I've also heard that people ride in Kangaroo pouches. I know it's true, I've seen nate doing it
.
I'm not too sure about it being rude to be early and polite to be late here. If someone's early, that's usually a good thing in my books as long as they're not too early. If they're late I don't mind too much as long as they're not too late.
But then again you said appointments and I thought you said parties... so meh...