The Four Man Plan: A Romantic Science, through September 30, Ruskin Group Theatre, Santa Monica Airport, 3000 Airport Dr., performances at 8pm Fridays and Saturdays, $20, 310.397.3244 or www.ruskingrouptheatre.com.
The Island, a play about South Africa’s notorious Robben Island prison, 8pm, through August 26, The Powerhouse Theatre, 3116 2nd St., 310.396.3680 or firstname.lastname@example.org.
Much Adoobie Brothers About Nothing, the Troubadour Theatre’s musical Shakespeare spoof, through September 10, Miles Memorial Playhouse, 1130 Lincoln Blvd., 310.979.7196.
Omnium Gatherum, a play about a post-9/11 dinner party, through October 7, The Will Geer Theatricum Botanicum, 1419 N. Topanga Canyon Blvd., 310.455.3723 or www.theatricum.com.
Twelfth Night, through September 30, The Will Geer Theatricum Botanicum, 1419 N. Topanga Canyon Blvd., 310.455.3723 or www.theatricum.com.