BRUNSWICK — On any given evening, Mary Fashik can be seen dancing on the front row in Zumba class at Bailey's Powerhouse Gym in Brunswick. Oftentimes teaching one or two dances herself, it's something the 38-year-old, vivacious Brunswick resident has enjoyed doing since her first Zumba class at the YMCA in February 2013."It was a Zumba Gold class, which is for older adults and adults with reduced mobility.