"Not all communities are communities of practice. What characterizes a community of practice is not a common characteristic, like living in the same city or liking a certain type of music: it is that members learn from and with each other about a practice they share. They learn to do something. They may be deepening in an existing practice or creating a new one. They may be engaging in their practice together or mostly using each other as partners to reflect collectively on a practice they engage in somewhere else. Note that learning may be the main reason they come together or a mere side-effect of their mutual engagement in some activities. Whether intentional or not, this joint learning binds members together."