The machine-operated cafe was first opened in San Francisco in 2017, and quickly gained worldwide attention as the having the first robot baristas making coffee.
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The company's founder Henry Hu tweeted that the downtown locations helped Cafe X develop the machines now operating at SFO and San Jose Mineta airports.
He also hinted that more airport locations may be coming.
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Cafe X is offering refunds to anyone with pre-paid app credits.
RELATED: Robot baristas serve coffee at San Francisco's Cafe X