A dōjō is a hall or place for immersive learning or meditation. This is traditionally in the field of martial arts, but has been seen increasingly in other fields, such as meditation and software development. The term literally means "place of the Way" in Japanese. wikipedia 
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A Coding Dojo is a meeting where a group of programmers gets together to learn, practice, and share experiences. This report describes the authors ’ experience of creating and running an active Coding Dojo in São Paulo, Brazil, sharing the lessons learned from the experience. pdf
A Wikidojo is a collaborative practice, inspired by coding dojos – exercises for computer programmers, which consists of a group of Wikipedians with different levels of experience in editing wikis. The group consists of a 'pilot' – the only person in the room who might use the keyboard, a 'co-pilot' – the only other person who is allowed to speak, and observers. wikimedia