As part of a review by former attorney general Eric Holder, a report recommended that Uber “take steps to … prohibit the use of controlled substances, including … prohibiting consumption of non-prescription controlled substances during core work hours, at work events, or at other work-sponsored events.” The report was based on an assessment of actual practices and problems — indicating that the review team found evidence of use of controlled substances during core work hours and at work events.
Mike Isaac’s Super Pumped is in accord: “Managers were doing drugs with their subordinates–cocaine, marijuana, and ecstasy” (p.27).