Common Wealth Endeavors, formed to present plays in English from countries outside the U.S., stages two dark comedies this weekend at Durham’s Common Ground Theatre. New Zealander Jess Sayer’s “Elevator” shows what happens when three women reveal secrets while stuck in an elevator. U.K. playwright Mike Bartlett’s “Contractions” examines boundaries of work and play in an office romance. 8 p.m. Friday-Saturday; 3 p.m. Sunday (through March 7). $15 (seniors, students and military $10). 919-410-8631 or artful.ly/fromcommonwealth.