Venus is more habitable than Mars.
If you took a sealed room and dropped in on Venus, it would sink to a point, then start floating. Because Venus earth air is three times more powerful as a lifting gas than helium is here. Humans could live in giant balloons of air and live in the upper atmosphere of Venus. There is a point where the pressure is earth pressure and that point has a temperature of about 30 celsius, and the entire atmosphere is carbon dioxide, so you would just need a mask and a container of air.