For events with Foursquare locations, it would be awesome to show the category Foursquare assigns to the selected place.

Displaying them as tags (from this suggestion: https://changemap.co/bigpaua/arc-app/task/3243-tags-hashtags-for-visits/) would be a nice way to allow it, while letting the user edit the tag for that visit if it’s not the category they preferred.

The analytics view could then show you how much time you spent at places categorized as Art Museums, for example.