LANCASTER, Ohio — Through 80 summers, drive-in theaters have managed to remain a part of the American fabric, surviving technological advances and changing tastes that put thousands out of business. Now the industry says a good chunk of the 350 or so left could be forced to turn out the lights because they can’t afford to adapt to the digital age – See more at: http://bostonherald.com/entertainment/movies/movie_news/2013/08/digital_era_threatens_tenuous_future_of_drive_ins#sthash.gp6KhxUy.dpuf