Cities list without address and location

Hello

I want to set up on the home page of my site the list of cities where recorded events. I know that we can display a location list with shortcode but I only want the city without duplication.

For example I have several events in London. In the list of location there are several location for all the events that are in the same city. I just want a link to london to see all the events in a page

I want a simple list of cities (without duplicates), and when clicked, it displays all events from the same town in a page.

Thank you very much

https://wordpress.org/plugins/events-manager/