QUIET, PLEASE: A Washington theater has imposed...

QUIET, PLEASE: A Washington theater has imposed a hard line against noisy patrons: two warnings and you’re bounced. But its owner, American Multi-Cinemas, has no intention of getting that tough at its 24 theaters here. . . . For one thing, local audiences are 70% “avids”--serious moviegoers who come often and quietly, said an AMC executive. In Orange County, he said, yakking during movies “is on the downturn.”