Eduardo Forte discusses how coworking space betahaus grew its community in Barcelona from 0 to 200 members in less than two years. He explains that they focused on shaping the space and community experience over specific amenities. Key strategies included hosting an intensive hackathon called "The Beta Challenge" that brought the community together to collaboratively build an app, and mixing marketing with the community by having members describe their experience at betahaus. The talk concludes with a Q&A.