We have a pro-drinking culture at my company due to the nature of the business and I haven't found that it's causing any problems. It's generally done outside of work or for specific events, and I've never felt unsafe on any gathering where a lot of drinking was going on.

This is a red herring, if anything.

I think there's a difference between a culture where people drink a lot vs a culture where people get black out drunk and irresponsible with it, though, and maybe Uber is more like the latter.