For southeast Michigan:

• Southeast Michigan Woodworkers, http://www.semiww.org
• Michigan Woodworkers Guild, http://www.michiganwoodworkersguild.org/
• Michigan Association of Woodturners, http://michiganwoodturner.org/
• Detroit Area Woodturners, http://www.detroitareawoodturners.org/
• Metro Carvers Club of Michigan, http://www.geocities.com/metrocarvers/
• Mid-Michigan Woodworkers Guild, meet in Dewitt Michigan http://www.mmwg.org

There are more clubs in other parts of the state, and there may even be more clubs in Southeast Michigan, but this will get you started.