This is where Meetups.com fits in. But this area has kind of migrated away from the traditional discussions (which now happen on places like here, Reddit, Slack). There's usually too many recruiters, managers, vendors and sales people involved. I'm not saying these people are necessarily bad for the environment, but to cater for a particular type of discussion - they detract from it.
How many conferences or meetups have you attended where a significant portion of the audience doesn't understand what's being talking about on stage (usually because "business" and "technical" tracks aren't broken up)?
I think there's definitely a space for this to succeed in. Look forward to attending.