It's a bit early for this to really work yet. We're still at the stage where we're all one community. 

Having said that https://swarmstr.com/ are making a decent attempt.  

 NoStrudel e Satellite  

 Look no further

https://soapbox.pub/ditto/ 

 No u don't need a relay to create a community unless you want to use #ditto. For regular communities use satellite earth to create them