John Mayer appeared at the 2001 Democratic National Convention.
 Mayer became a fixture of the event, including at the 2007 iPhone announcement
 In January 2013, Mayer participated with Zac Brown in a benefit concert in Bozeman, Montana where they raised more than $100,000 for firefighters who battled a wildfire in the summer of 2012 in Paradise Valley that destroyed 12,000 acres

