When Amol Kohli started working at a Philadelphia-area Friendly’s as a waiter in 2003, he was a restless sophomore in high school hoping to make some pocket change. Kohli made about $5 an hour at the diner-style restaurant chain, doing any job his manager needed, he tells CNBC Make It. On any given day, he was a cook, a dishwasher, a table busser, an ice cream scooper, you name it.