When Lorraine Hansberry, author of A Raisin in the Sun, died in 1965, she left behind an unfinished play called Les Blancs, which explored the devastating impact of European colonialism in Africa while also indirectly commenting on race relations in the United States. Hansberry's friends polished Les Blancs up a bit and the play was eventually staged on Broadway. A new production comes to Out ch'Yonda (929 Fourth Street SW) starting this weekend. It'll run Fridays and Saturdays at 8:15 p.m. with Sunday matinees at 3:15 p.m. $7, $10. Runs through Oct. 17. Call 243-4325 to make reservations. Seating is limited.