This app was mentioned in 1 comment, with an average of 5.00 upvotes
I'm neither politically active, nor identify as an atheist (although I don't care much about religion), nor have any interesting stories, so I'll pass.
But on the other hand, let me just link this useful site here for you: http://otkucaji-grada.rs/en/map
It's a site that shows various locations (restaurants, bakeries, stores, ATMs, parks, etc) and events in Belgrade. Just select what you want from the menu on the left side. There's also an android version, although it's bascially the same as the web version. I made it, btw. Maybe that's an interesting story?