For a foreigner, there are some interesting jobs here in Brazil. Let me show you a few that I see around Rio de Janeiro.
The Corn on the Cob person. You can buy fresh, and extremely tasty, corn on the beach or the street.
The Street BBQ dude. This is very weird but quite common. These guys set up their on bbq, bring the meat, and sell it on random corners. Get this, people buy it! Hell, I have too! Eat meat, chicken, chicken hearts, sausage, and more.
The beach Mate Guy. One tin lime juice, the other a Brazilian ice tea called Mate. You take a cup and mix the proportions yourself.
Knife sharpeners. I think the picture says it all
Beach Empada guy. He sales salty cupcake type things filled with meat/cheeses/etc. Random beach food but a job with a view.
Massages in the park. Go to Aterro in Flamengo and you'll see a couple of massage tables set up. You can also find them on the beach. Sorry guys, I prefer licensed people rubbing my body parts.