Here in Latin America, or at least here in Colombia, people call 500 grams "a pound" ("una libra") even though we never have used imperial officially
Rarely used, yet pretty much universally understood.
With regards to volume, I am used to 750mL bottles of wine.
Converting distance is still unintuitive to me. The best method I came up with is that driving 60 miles per hour is about 100 km per hour.