I was looking at this for something else, and thought this might be nice for PLUG.  

https://slack.com/help/articles/204368833-Slack-for-Nonprofits

I use Slack chat a lot with various customers and partners, and it's free to nonprofits ala PLUG (I think) if under 250 users.  Not sure how many folks are actually joined to PLUG offer that to everyone (that would actually participate), but I'd be interested in joining it if one existed with the folks that normally participated here.

Thoughts?

-mb