For Effective Altruism,not strictly for hackers,but there is this. <a href="https://forum.effectivealtruism.org/posts/nxfhxwQg4HJ7KQz4A/ea-coworking-lounge-space-on-gather-town" rel="nofollow">https://forum.effectivealtruism.org/posts/nxfhxwQg4HJ7KQz4A/...</a>
I've been using one called FLOWN. It's not just for engineers, but some community sessions are themed (writing, coding, etc). There is not much chat in these other than sharing your intentions and reflecting on how you did afterwards--the main point is focusing in a video call with other people.
How would an online-only co-working space work? I thought co-working is about being together in the same room? <a href="https://en.wikipedia.org/wiki/Coworking" rel="nofollow">https://en.wikipedia.org/wiki/Coworking</a>