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There is a good list on gridcoin.us, bottom of the home page.

Lesson learnt, I never took serious look at the bottom of the page.
https://discord.gg/Bt4YHxJ
https://www.mixcloud.com/gridcoin_hangouts/
https://soundcloud.com/gridcoin-community-hangouts too.

Thank you

You're very welcome! A lot of info on that page, so easy to miss things. =)

True that, the list of communities on the menu will take your mind off looking around for more links on the page.