A speaker in the parking lot of the Safeway on Webster Street near Geary had been playing music since February, according to the San Francisco Chronicle.
It's used to deter loitering.
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Over the weekend, the volume went up and stayed on overnight, but as of June 4, the music has stopped playing.
A Safeway spokesperson says playing music is a "common industry practice," but it's unclear why it's being played so loud.
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