Mustard’s Retreat has always sung the songs they enjoyed and cared about, regardless of the trends of the music industry and pop culture. They are committed to simply being themselves, not chasing fame or brass rings, while delighting in and connecting with their audiences as if they were family. The honesty of what they present onstage and the extensive body of outstanding original songs and recordings all contribute to a fiercely loyal audience that continues to grow. “Music to cure what ails you” was how one reviewer in the 1970s described them, and that is as true now as it was then.

They’ve traveled more than a million miles and performed more than 6,000 shows, from pig roasts and pool parties to Lincoln Center Out of Doors, The Barns at Wolftrap and the Kennedy’s Center’s Millennium Stage. They’ve recently begun referring to their career and touring as “Defiantly Hopeful.” In part due to their long career, but more as a statement about what the music has meant to them.

“Folk music is, at its heart, defiantly hopeful!” founder David Tamulevich says. “We came of age in the 60s, at the confluence of Pete Seeger, Peter, Paul & Mary, Bob Dylan and the singer/songwriter revolution. We care much more about what we do and stand for and finding that common ground with our audiences, than fame or money: this is our community of choice, and we consider ourselves so fortunate to be here.”

Tonight’s show features the Mustard’s Retreat 2.0 duo of Tamulevich and Libby Glover, who come to The Ark with a new album, “By Request.”