With some friends, we try to develop the Apache Spark community in the Triangle area of North Carolina, USA. If you are from there, feel free to join our Slack team: http://oplo.io/td. Danny Siegle has also organized a lot of meet ups around the edX courses (see https://www.meetup.com/Triangle-Apache-Spark-Meetup/).

Sorry for the folks not in NC, but you should come over, it's a great place to live :)