Tame Impala: A year after releasing “Currents,” its third album, the Australian psychedelic rock band continues to win unlikely new fans, including John Mayer and Lady Gaga. 8 p.m. Friday, Sept. 2. Greek Theatre, UC Berkeley. www.ticketmaster.com
“Assassins”: Los Altos Stage Company presents the Stephen Sondheim musical about the successful and unsuccessful assassins of U.S. presidents. 8 p.m. Friday, Sept. 2. Bus Barn Theater, Los Altos. (650) 941-0551. www.losaltosstage.org