He made a PR mistake. You don't drink and have fun like that in a crisis (or at least don't get caught doing it.)
Note: I'm not saying Uber's only mistake is PR. But it's a large part of what precipitates the unique reaction against them versus, say, Lyft. #DeleteUber? Came up because Uber cancelled surge at 7:36PM around a protest at JFK that was scheduled at 4:55 to last from 6 to 7PM. Lyft, meanwhile, earned more money and got a better reaction.
Similarly, in reaction to Fowler's account, instead of doing something substantive they hired an Uber Director, the head of the department implicated and an Uber lobbyist to conduct an "independent" investigation.