As museum professionals conceptualize community building, they must now consider the virtual realm. Websites in and of themselves will not generate a community, as it takes sustained communication and interaction by staff to encourage growth. Online communities are complex forces that bring about systematic dualities that in turn stimulate contact, collaboration, and learning. "Cooking: The Exhibition Chefs" at the Liberty Science Center models six conceptual dualities that resulted in a thriving Community of Practice. This article analyzes "Cooking's" online process using social learning theories to reflect on how people interact with one another in both physical and virtual settings. (Contains 18 notes.)