1972-73  The Bompa Bros Band predated Dry Jack. Three Lamb brothers- John, Rich and Chuck joined by guitarist Rocco Marshall, Jon Margolis, and percussionist Greg "Brimble" Collins

1973-1982 Dry Jack at one time 7 pieces, eventually 4, recorded two albums read more here

1989-1991 The Dave Wong Trio later became Group DuJour pianist and Cleveland fan David Wong joined by bassist Doug Perry and Jon Margolis. Jazz in the outback.

1989-1993 The Pawnz Guitarist JD Fiedler, Doug Perry and Jon Margolis playing everything hip under the sun in a secret hideaway hotel gig in Lead, SD.

1994-2006 WIRED screaming blues trio featuring guitarist Marty Nelson, Doug Perry and Jon Margolis. see more here

mid 90's Hank Christy and Jon just like the name says- Hank Harris, Christy Anderson and Jon Margolis performed a wide range of groovy stuff including Hank and Christy originals

mid 90's-2007 The Shades Hank Harris with Doug Perry and Jon Margolis see more here

mid 90's-? The Suspects Black Hills supergroup formed by accident to cover a Deadwood gig. see more here

2000-2005 Swing Shift jazz quartet see more here

2001-2002 Twisted Krust Kelli Heidler, Ricky Jacobsen, Jon Margolis and a rotating guitar staff including JD Fiedler, Barry Pitt, Matt Berry and Brian Winter. Actually played the Longbranch country bar in Pierre.

2002 Ezmerelda hot but short lived. Sequoia Crosswhite, Kelli Heidler and Jon Margolis. We gigged Sioux Falls.

2002-2005 Screamin' Angels started as a contemporary country band with Jennifer & Travis Hanson, Kelli Heidler, Brian Winter, Ricky Jacobsen and Jon Margolis. Later went more rock and Dennis Milek replaced Kelli.

2003-2005 Tubesteaks all around R&B with Ricky Jacobsen, Brian Winter, Doug Perry & Jon Margolis

2005 JIZAZZ jazz R&B group with Gary Bloomberg, Ricky Jacobsen, Chuck Thomas and Jon Margolis

2005-2007  Clear Blue high energy R&B and rock with Jennifer Hanson, Greg McDonald, Jon Margolis, and Doug Perry (later replaced by Bernhard Winkler)

2007  Junior and the Prime Suspects played one gig during Christmastime that's been memorialized on YouTube. The group featured the father-son team of Will and Chambers Waller, bassist Bernd Winkler and drummer Jon Margolis joined by special guest Jimmy Mendoza  see more here