From their web site http://www.mustardsretreat.com/history/index.html

David Tamulevich and Michael Hough celebrate their 31st Anniversary as Mustard's Retreat, the same question seemed to burn among aspiring young performers and road-weary old folkies - why you guys? In searching for the answer, one word comes up again and again, the simple word "audience."
Michael and David met in 1974, in the college town of Ann Arbor, Michigan, where they had attended the University of Michigan.
... at a 1974 open mike at the Ark coffeehouse in Ann Arbor. Once they discovered their shared love of folk music, they worked up three songs and took them to the club. They were immediately asked back for a showcase night, and within a couple of months were the "house band" at a local bookstore. Within a year, they were gigging full time at pubs, colleges, concerts and coffeehouses. The group's name does not come from a historical event or old fiddle tune, as is often believed, but from a musical chum named Nancy Mustard, who taught David a guitar slide, around which he wrote an instrumental called "Mustard's Retreat".
Through the years, they have released six records, including an often hilarious live CD called "5 Miles or 50,000 Years," and a warmly reflective set of original songs called "Wind and the Crickets," which offers convincing proof of Tom Paxton's thesis that their stage antics work because they have the musical chops to go with them.
Check their web site for more info.

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