This document discusses knowledge creation in third places such as coworking spaces, hacker/maker spaces, and fab labs. It argues that these spaces foster open and social innovation through their emphasis on collaboration, inclusion, and a playful spirit. Regulars in these communities welcome newcomers and share knowledge in a spirit of "bricolage," drawing on resources at hand to solve problems. Qualities of third places like neutral ground, leveling effects, and conversation can support knowledge sharing and creation when replicated in a "Third Places 2.0" model.