Lakewood, a suburb next to Long Beach (not as famous as Levittown, but it was the first city that was designed with a shopping center at the center of the city) is where I grew up. It's slogan: "Tomorrow's City Today."
Yes, and it's mentioned in the Columbus article: "Austin, Live Music Capital of the World." And it's true, it's often very difficult to avoid live music here, no matter how desperately I try. My wife and I once tried to eat brunch at a little cafe near our old apartment after a late night (we were a bit hung over) and were horror-struck as an amateur jazz band with a tap-dancing singer began "jamming" five feet away from us shortly after our eggs had arrived.
The unofficial slogan of Austin is "Keep Austin Weird," which I prefer.
The motto of my native city, San Francisco, is "Oro en Paz, Fierro en Guerra" (Gold in peace, iron in war"), which sounds pretty bad-ass.
Where I live is sometimes called Happy Valley, but never by anyone who lives here. That was invented by college football announcers. It is in the name of a few businesses and on t-shirts and there's a rugby club called Happy Valley Barbarians.