Denver tech entrepreneur Danny Newman remembers when his mother, Paula, started working as a waitress at My Brother’s Bar, the iconic watering hole in Lower Highland. He was just 4. “It has been part of my family for most of my life,” said Newman, who worked there during his summer breaks in high school. It is about to become an even bigger part of his family’s life. Newman, together with his mother, who has managed the location the past two years, and his father, David, an optometrist, purchased the business and related property from long-time owner Jim Karagas on Tuesday. When it comes to cutting-edge tech entrepreneurs, Newman, 36, fits the bill.