there is a site where some groups list their jams, open mike, etc.
http://www.folkjam.org/home

    *
      "Bluegrass Hour" at Zellie's Opry House "Friday Night Fun"
      Fri 25 Jun, 2010
      Howard City, MI
      Weekly on Friday
    *
      Acoustic Jam at Zellie's Opry House
      Fri 25 Jun, 2010
      Howard City, MI
      Weekly on Friday
    *
      Spirit Jam - Acoustic Music Jam
      Fri 25 Jun, 2010
      Brighton, MI
      Monthly on 4th Friday
    *
      bert hopp jam
      Fri 25 Jun, 2010
      rockford, MI
      Weekly on Friday
    *
      Mt. Haley Jamboree
      Fri 25 Jun, 2010
      Midland, MI
      Monthly on Last Friday
    *
      The Acoustic Music Jam
      Fri 25 Jun, 2010
      Grayslake, IL
      Monthly on 2nd Friday, 4th Friday
    *
      buttwheat jam
      Sat 26 Jun, 2010
      greenville, MI
      Weekly on Saturday
    *
      Maple Wood Nature Center Folk Jam
      Sun 27 Jun, 2010
      LaGrange, IN
      Monthly on 4th Sunday
    *
      Donckers Acoustic Jam
      Sun 27 Jun, 2010
      Marquette, MI
      Weekly on Sunday
    *
      Sunday Barn Jams and dancing/clogging
      Sun 27 Jun, 2010
      Lake Odessa, MI
      Weekly on Sunday


here is what is listed...hope something here might be of interest..
i wonder what Bad Axe, MI is like?? maybe not such a good place for a jam?? it looks like the closest might be:

West Michigan Dulcimer Club
Recurring jam session

Contact Kathy Messenger: kmessenger@azulst...
Spring Lake Wesleyan Church
15550 Cleveland Street
Spring Lake, Michigan

or

Coopersville Farm Museum
375 Main Street
PO Box 64
Coopersville, Michigan 49404

or

Fenian's Irish Pub
19683 Main Street
Conklin, Michigan 49403

good luck, and let us know what you find.
also, recommend to folks that they list jams
here on mudcat or at the folk jam site i linked to.

Laurel