The washboard and frottoir (from Cajun French "frotter", to rub) are used as a percussion instrument, employing the ribbed metal surface of the cleaning device as a rhythm instrument. As traditionally used in jazz, zydeco, skiffle, jug band, and old time music, the washboard remained in its wooden frame and is played primarily by tapping, but also scraping the washboard with thimbles. Often the washboard has additional traps, such as a wood block, a cowbell, and even small cymbals. Conversely, the frottoir (zydeco rubboard) dispenses with the frame and consists simply of the metal ribbing hung around the neck. It is played primarily with spoon handles or bottle openers in a combination of strumming, scratching, tapping and rolling. The frottoir, also called a Zydeco rub-board, is a mid 20th century invention designed specifically for Zydeco music. It was designed in 1946 by Clifton "King of Zydeco" Chenier, and fashioned by Willie Landry, a friend and metalworker at the Texaco refinery in Port Arthur, Texas. Clifton's brother Cleveland Chenier famously played this newly designed rubboard using bottle openers. Likewise, Willie's son, Tee Don Landry, continues the traditional hand manufacturing of rubboards in his small shop in Sunset, LA. The frottoir or vest frottoir is played as a stroked percussion instrument, often in a band with a drummer, while the washboard generally is a replacement for drums. In Zydeco bands, the frottoir is usually played with bottle openers, to make a louder sound. It tends to play counter-rhythms to the drummer. In a jug band, the washboard can also be stroked with a single whisk broom and functions as the drums for the band, playing only on the back-beat for most songs, a substitute for a snare drum. In a four-beat measure, the washboard will stroke on the 2-beat and the 4-beat. Its best sound is achieved using a single steel-wire snare-brush or whisk broom.
However, in a jazz setting, the washboard can also be played with thimbles on all fingers, tapping out much more complex rhythms, as in the Washboard Rhythm Kings, a full-sized band.
In British Columbia, Canada, Tony McBride, known as “Mad Fingers McBride” performs with a group called The Genuine Jug Band. Referred to as “The Canadian Washboard King”, his percussion set-up was created with personal help from members of the Hoosier Hot Shots and Spike Jones and the city slickers.
Cody Dickinson, a member of hill country blues bands the North Mississippi Allstars and Country Hill Revue plays an electrified washboard on a self written track; 'Psychedelic Sex Machine'. The song is almost entirely centered around the sound of the washboard, which is picked up by a small clip on microphone. The sound is then sent through a wah-wah and other effects pedals to create a fresher, more innovative and up-to-date sound for the washboard. A frottoir is played with a stroking instrument (usually with spoon handles or a pair of bottle-openers) in each hand. In a 4-beat measure, the Frottoir will be stroked 8 to 16 times. It plays more like a Latin percussion instrument, rather than as a drum. The rhythms used are often similar to those played on Guiro. St. Blues makes the Woogie Board an electric Washboard instrument.