“Not-Our-Holiday.” Live music from Linda Hirschhorn and Jack Gabriel. At Afikomen Judaica, 3042 Claremont Ave., Berkeley. 2 p.m. Free. www.afikomen.com.
friday and saturday/27-28
Fungus — the good kind. The Israeli electronic dance/psychedelic trance duo Infected Mushroom comes to San Francisco for two nights in support of their 2012 album “Army of Mushrooms.” The two L.A.-based artists have written and performed music for nearly 20 years and produced a track on Lady Gaga’s new LP Artpop. Check out their album cover art online. 9 p.m. Friday and Saturday, Dec. 27-28 at the Regency Ballroom 1300 Van Ness Ave., S.F. 9 p.m. $25-$45. www.theregencyballroom.com
Yiddish concert. Musician Myrna Rabinowitz will perform original and classic Yiddish songs for all ages. At Afikomen Judaica, 3042 Claremont Ave., Berkeley. 4 p.m. Free. www.afikomen.com.