SCW Boston MANIA is a three-day continuing-education convention for fitness professionals at the DoubleTree by Hilton Hotel Boston North Shore in Danvers, with what the organizer describes as 150+ sessions, hands-on workshops and certifications for group exercise instructors, personal trainers, aqua and mind/body instructors and club managers. Alongside it runs a three-day Expo that the organizer says is free and open to the public, selling fitness equipment, exercise videos, activewear, music, nutrition products, resource books and online certifications. Expo hours are Friday and Saturday 8:30 AM to 4:30 PM and Sunday 8:30 AM to 12:30 PM (closeout shopping). Convention registration is paid, from $259 for one day to $399 for three days at regular price. Companies can exhibit; the organizer's exhibitor sheet lists a Boston single booth at $599 and forecasts about 500 attendees.