Floating City over Venus

I'm a big fan of vacuum airships. I suspect that we have already materials which are light enough and strong enough in tension, but we're not there yet with material strength/lightness in compression. I don't doubt that we'll get there eventually, though.
The ability to use plain old Earth air as a lifting gas is a big deal, though. Look at something like the Hindenburg: if the lifting gas had been something you could breath, there'd've been room in that thing for ballroom dancing, a movie theater, and probably full-scale soccer matches!
Of course, not 3D weightless soccer, or full-G Earth-style soccer, or Lunar gravity soccer, because it would be the exact same Venus gravity all the time all the time all the time.