I wrote on my feed earlier about the idea of using hashtags together with a part of OLC to make local discoverability a thing. This community is meant to test out this idea to enable people to announce their local devotional meetings so people can find them.
You can see that this post is tagged with #geo9f4743 and #geo9f4744. If you look at https://plus.codes/9f474300+ (that is, add 00+ to the end of the code in the tag) you will see that this is a part of Utrecht, my local region. You can tag your posts for your region and subsequently find posts related to your region (when people start using this) using this simple recipe. Of course it's best to simply implement this in tools, but the idea of using hashtags for this is that you can existing tools to start using it, no need to wait for specialized tools to enable location based social networking.
Take a look at https://localprayers.net to see how I am progressing! (... probably badly, but comment about it anyway to keep me motivated ;) )