Earlier quoted context omitted.
"Did you know that there are parts of Venus which are a shirt-sleeve (and breathing mask) environment?" Please expand on this.
Venus has a very thick atmosphere. At the height of a few miles above surface, there are layers with room temperature and human-acceptable pressure. Of course, the atmosphere is still CO₂ with some nasties, so a gas mask is required. But a Star-Wars-esque floating city would be quite manageable there. You can use hydrogen for floating because there's not oxygen around, so no risk of a blast. NASA is already working o…
And it's better than you think: the atmosphere there is largely carbon dioxide, which is denser than air; so you don't need hydrogen for bouyancy. You can use breathable air and live inside the balloons. The inside's at a slight overpressure, so any leakage will be outwards rather than inwards, and the pressure differential's pretty small so it's likely to be pretty unexciting.
You're above the clouds, so there's plenty of sunlight. Luckily there's this really big surface to spread solar panels on; your balloon. Then you can electrically break down the carbon dioxide into oxygen. Or just use plants. What is it they like again? Oh, yeah, carbon dioxide...
What you don't get is much in the way of heavy elements; light organics (CHON, mostly) can be extracted from the atmosphere, but that does solve your immediate life support issues. Metals you'll need to go to the surface for, which may be a little exciting, but is perfectly doable (by machine, preferably). You're probably better off building out of organically produced carbon fibre, i.e. wood.
Venus really is one of the most hospitable planets in the solar system, after Earth. If you like planets, of course.