Teams representing six D.C.-area professional theater companies will write, direct, rehearse and perform six original plays in a 24-hour period in this seventh annual event produced by the Bethesda Urban Partner and Bethesda Arts & Entertainment District. The six companies represented are Adventure Theatre, Ganymede Arts, Imagination Stage, Olney Theatre Center, Round House Theatre and Woolly Mammoth Playground Playwrights. Saturday, March 12, at 8 p.m. Lerner Theater at Imagination Stage, 4908 Auburn Ave. Bethesda. Tickets are $15. Call 301-215-6660 or visit Bethesda.org.