Sarah, let me say, this was a great article. I think you are bringing up a good point about the alcohol dominated culture of the startup world. As a social drinker, and someone who has worked regularly with startups, I have witnessed this over-reliance on alcohol all too much.
Startups will fail if they do not embrace people, cultures, and religions where alcohol is not the first choice for entertainment. As a software engineer, I can assure you that I have worked with a great many Muslim, Mormon, and (non-drinking) Hindu engineers I consider amongst the best in the world. Each subscribes to heartfelt beliefs about how alcohol is not to be a part of their lives. They are not intolerant of others drinking, but should never be expected to.
I can assure you that no tech-oriented company can make it past a decade without confronting this. Not to mention the fact that allowing individuals to make their own choices without judgement is the best way to live, even when it’s not good business. It just so happens that the two are related in this case.