CrossFit South Brooklyn is a Brooklyn-based CrossFit affiliate that grew from two classes per week and about 10 members to five days per week with more than 50 consistent members. It describes itself as one of the largest and best-known CrossFit affiliates worldwide, with additional visibility through Coach David's blog, Inside the Affiliate, which mentors readers around the world. The gym has also been involved in fundraising and community support efforts benefiting organizations including the Brooklyn Community Foundation and the Sunrise Movement Foundation.