Ask HN: Is there an IRC server or a Slack community for ML/Recommender Systems?

I would like to get in touch with other people in the field. Discuss ideas, see what others are working on, etc. When I was still in university I randomly joined programming related IRC channels and always got something out of it. Now I am at a loss where to find a place to converse. Where are those communities? Please let me know.

Other software related chats are welcome, too!