CrossFit 781 looks more like a gentrified hangar than a gym—there are ropes dangling from the ceiling and heavy objects pinned to the matted 6,000-square-foot floor—but the space is ideal for CrossFit’s workout of the day. Led by co-owner Jason Brown or Danielle Bjorkman or their staff of fellow CrossFit Level 1 coaches, each workout includes a daily series of functional exercises such as pull-ups, push-ups, or flipping oversized tires that are to be completed as quickly and intensely as possible while maintaining proper form.