Porch Party Mamas celebrate 20 years with new album and Mother’s Day concert.

Before the advent of Porchfest in Somerville and Cambridge, a group of five Cambridge musicians, along with their partners and passersby, entertained with porch performances on Cameron Street. With windows wide open to allow the sound of piano strokes to escape from their living room, the ensemble utilized guitars, wax paper, combs, and various noise-making objects to create their music.

Originally operating as solo performers, the five women transitioned their porch concerts into a permanent venture by coming together to form a group called the Porch Party Mamas. The Americana folk band, now a trio, marks its 20th anniversary by commemorating the occasion with the release of their fourth album, “Spin,” along with a special Mother’s Day event at Club Passim.

The formation of the group was inspired by the realization that playing music together brought more joy than individual gigs, shared Felicia Brady-Lopez, who handles accordion and piano duties. Over the past two decades, the band’s sound has evolved, becoming more adaptable as they explore and refine “half-baked” musical ideas collectively during rehearsals, as expressed by Ksenia Mack, responsible for guitar and banjo.

Each member of the Porch Party Mamas, who happen to also be music educators, contributes vocals accompanied by various instruments such as guitar, banjo, piano, accordion, and hand percussion. The group’s distinct sound is characterized as “genreless,” resulting from innovative instrument arrangements, as recounted by Brady-Lopez, whose infant son once slept under the kitchen table during rehearsals in the early 2000s.

Set to take the stage at Club Passim on May 10, the Porch Party Mamas will dazzle audiences with two sets. The first set will showcase tracks from their latest album, “Spin,” while the second set will feature former band member Jane Grondin. The group is particularly excited about performing new songs like “Mass Ave Protest,” an instrumental track, and “July 3rd,” a composition centered around a message of affection.

When performing together, the Mamas seek to create an experience that delves into life’s beauty, challenges, frustrations, and emotions. Emphasizing the expressive power of music, Brady-Lopez highlighted its role in connecting with others and offering a form of shared expression. The group’s performances are more about having fun with the music they play, added Katrin Peterson, responsible for percussion and piano.

According to Mack, the most thrilling aspect of their performances lies in the spontaneous nuances each member introduces, be it through varied vocal deliveries, new rhythmic elements, or added instrumentation. These “little sparkles” and embellishments injected into their songs by each member represent the magic of live musical performances, she concluded. Don’t miss the opportunity to catch the Porch Party Mamas at Club Passim on May 10 at 7 p.m., with tickets priced at $35.