Ahh, I think I understand you now. You could create an event category for each city/location. For instance, if you created a category for every event in Paris, then you would have a URL like example.com/events/category/paris/. And that would show all events in Paris.
Here is an example event category. In this case it is showing all “WordPress Meetups”. But for you, it could show all events in Paris instead.
Does that make sense? Am I understanding you correctly? Please let me know. Cheers!
– Brook