Firstly - good for her ! She is keeping herself active, which is probably helping to keep her alive.
Secondly - its a laundromat. If it provides basic service, she watches TV, socializes, makes change, and cleans lint traps. Maybe also sells detergent and bleach. If the laundromat has a wash/dry/fold service customer that day,then she puts a few loads. I'm certain that they have a maintenance guy who handles equipment maintenance/repairs. Anyway, the job isn't overly stressful physically, and is probably helping to provide her the right amount of exercise per day.