Most of the items in this list are no longer current but are presented here since they represent a selection of various interests and activities of members of Twin Oaks at the time this list was created.

Over the years countless groups have been formed for specific purposes, some by invitation, some open to all commune members. Here are examples that come to mind beyond linked articles presented in this category:

• Re-evaluation co-counseling
• Scrabble
• Non-violent communication
• Language learning groups: examples include Esperanto class and French table at dinner
• Bridge card game
• Knitting
• "Transparency" personal growth