Core Fusion Fitness models its facility after a day spa, from its chic aesthetic to its mix of private and shared spaces. Instead of manicure stations and private treatment rooms, however, there’s a room with Pilates machines, a space for stationary bikes, an open gym area with punching bags and a boxing ring, and a spacious studio with high ceilings to facilitate dumbbell juggling. Busying themselves in these areas are the facility’s fitness instructors, who schedule a multitude of group classes. They lead traditional yoga, Zumba, boot camp, and cycling along with more fight-focused sessions, such as kickboxing and muay thai.