Ah, Wilderness! (Eclipse Theatre Company). Eugene O'Neill's only comedy is sort of like Long Day's Journey into Night if you take away the morphine addiction, tuberculosis, and shattering sense of inexorable tragedy. The corn pone in the script defeats group scenes in Kevin Hagan's staging, but some strong acting redeems the rest. Through September 2.
Three Sisters (Steppenwolf Theatre Company). Chekhov's heartbreaking classic about the Prozorov sisters, who pine for Moscow but never make it there. Tracy Letts's uneven adaptation removes any sense of context, but the cast's performances cut to the quick. Through August 26.
Reefer Madness (Circle Theatre). A musical spoof of the 1936 anti-drug movie in which marijuana turns all-American teens into violent, sex-crazed deviants. Circle Theatre's production has all of the energy and some of the inventiveness of the company's recent Urinetown. Through August 26.
Crowns (Goodman Theatre). Regina Taylor's salute to black church ladies and their off-the-chain hats (designed here by Karen Perry). Performers Felicia Fields and E. Faye Butler could put the fear of God in the devil himself. Through August 12.