Addie shifts her weight and tilts her head, working every angle to blend the blue and black strands of hair that frame 53-year-old Ritalia’s dark-lined eyes.
A few chairs over, another student of the Paul Mitchell cosmetology school takes electric clippers to a man’s barely there curly hair.
There’s seating for more than a dozen potential clients, lining a wall at the end of the gymnasium at Columbia’s Martin Luther King Jr. Park…