Yes, they do work outside, but how they spend their nonwork hours is probably interesting.
Most I see around here appear to be Hispanic. I hear a lot of Spanish near construction sites. We see them coming and going on the streets. I know the area NE of us has a lot of Hispanic and Asian immigrant population (and some good restaurants). They often live in crowded conditions, many are sending money "home" or aiding other immigrant families who can't work.
We have a guy in our building who cleans everything, he's awesome, barely speaks English, but he works very hard even when no one is around watching. Super guy, apparently has been here for many years I'm told.
Our construction would collapse without the Hispanic population doing the hard work there.