Kristen Fonte’s path to the side gig life began as many do. She was a broke college student trying to make ends meet between classes and other side jobs, like waitressing. After all, the thought of graduating with piles of student debt terrified her.

By her sophomore year of college, she was introduced to and hooked on Zumba, a Latin-infused dance workout trend. When she saw how much fun her instructors had leading classes, she thought: What better way to put a love of working out to good use than getting paid to sweat?