The Bagel owner Marvin Barsky and vice president Melissa Bulger at their Lakeview restaurant and deli, located at 3107 N. Broadway, on Aug. 31, 2023. (John J. Kim/Chicago Tribune) At 78, Chicago business owner Marvin Barsky is at the peak of his career. It wasn’t his heyday as a NASCAR speedway baron, or his gilded age as a shared office space tycoon. In January, he cinched the opportunity to become the first new owner of The Bagel Restaurant and Deli in 54 years. Advertisement “I was nervous, to be very honest. At my age, I gotta be nuts to do...