I participated in Recurse Center (formerly Hacker School) in 2013 and in 2014, and emerged a better programmer, a calmer and kinder person, and a more confident learner. Gender diversity was part of the quality of that experience:

When part of the joy of a place is that gender doesn't matter, it's hard to write about that joy, because calling attention to gender is the opposite of that....

But, as Nick Bergson-Shilcock says in "What we've learned from seven years of working to make RC 50% women, trans, and non-binary", "We focus on diversity so Recursers can focus on programming.":

In April of 2012, we announced our goal to make RC 50% women. Seven years later, we are close to reaching an improved version of this goal: 48% of new Recursers in 2019 so far identify as women, trans, or non-binary. This post is a summary of what we’ve tried, learned, and accomplished over the past seven years, as well as our overall strategy and why we choose to prioritize this work.

Bergson-Shilcock's case study shares stats, what didn't work, and what they don't know yet -- the people who run RC are consistently like this, and this writeup exemplifies their judgment, integrity, and foresight. Even when I've disagreed with RC's faculty, I have always come away from the disagreement with my trust in them intact or increased. How many institutions could I describe in that way? Not many.

One last thing -- I've recently been trying to avoid saying "community" when I really mean group, set, school, industry, project, or workplace, and Bergson-Shilcock's articulation is gonna help me do that and to value substantive communities:

Having a genuine community requires that people know the other people around them, and that everyone shares some fundamental values and purpose.