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I'm only part of two, but they are both fantastic!
First would be 
Hive account@steemitbloggers which, if you haven't heard of them, is a semi-exclusive community. They do have activity requirements, but it's for the benefit of all as the more the members help one another the more everyone benefits from this. I've only been part of them for a few months but my reputation has gone up a full 4 points, I'm getting more payouts per post, and I'm interacting with a community that's active and interesting and getting exposed to posts I otherwise wouldn't know about! They're worth a follow even if you don't join up just for the great content, and every now and again they decide to open doors again for potential members to apply to join :)
Second would be 
Hive account@steemittarot which is a community of tarot readers on the steem blockchain. It's a little dead at the moment, but they welcome both readers and those just interested in general. They also host Tarot Tuesday, a thing where readers put up free weekly readings as posts for anyone interested and it's pretty neat ^^
