Celtic Fiddle

The charismatic Irish American fiddler Eileen Ivers, perhaps best-known for her work with the hit Irish musical “Riverdance,” will bring her band to the Thousand Oaks Civic Arts Plaza Friday. Her work with groups such as Hall & Oates and the Celtic/hip-hop/rap group Paddy A Go Go, and on her own albums, “Wild Blue” (Green Linnet) and “Crossing the Bridge” (Sony Classical), has often found her in the midst of a caldron of instrumentation.

* Eileen Ivers, Friday, 8 p.m., Thousand Oaks Civic Arts Plaza Kavli Theatre, 2100 E. Thousand Oaks Blvd. $17.50-$35. 449-2787.

Comic Opera

Ventura-based composer John Biggs will premiere his new opera “Hobson’s Choice” at Ventura College Theater beginning Friday. The comic opera is based on the Harold Brighthouse play of the same title and is being presented through the resources of the college’s Opera Workshop, directed by Linda Ottsen.

* “Hobson’s Choice,” Friday-Saturday, 8 p.m.; Sunday, 2:30 p.m.; Oct. 19, 8 p.m. Through Oct. 29. Ventura College Theater, Loma Vista Road between Ashwood Avenue and Day Road. $12-$18. 654-6459.

Organ Celebration

The concert “Pipes Spectacular” in Thousand Oaks on Sunday will celebrate the history of the pipe organ and pay homage to Bach’s contributions to the instrument. The family-oriented performance will feature several organists performing works by Bach and American composers. Performers include Cal Lutheran University music professor emeritus Carl Swanson and 14-year-old Tiffany Chen. The concert is sponsored by the Ventura County chapter of the American Guild of Organists.

* “Pipes Spectacular,” Sunday, 3:30 p.m., Ascension Lutheran Church, 1600 E. Hillcrest Drive, Thousand Oaks. $10; students and children $5; families $25. 497-1959.

Art Tour

Ojai as an artists’ enclave will be highlighted at this weekend’s 17th annual Ojai Studio Artists Tour. More than 30 artists will open their studios and homes in this self-guided tour, which raises money for community outreach programs in the arts. A featured stop will be the recently reopened studio and gallery of the late famed potter Beatrice Wood, in the Upper Ojai area. A gala reception and art auction will be held Saturday, 7 to 9 p.m., at the Ojai Center for the Arts.

* Ojai Studio Artists Tour, Saturday-Sunday, 10 a.m.-5 p.m., starting at Ojai Center for the Arts, 113 S. Montgomery St., Ojai. $20 advance; $25 day of tour; admission good for both days. 646-8126.