Well I use events as marketing events. Then users subscribe to several events at the same time.
When they make new hotspots with my application they link an event to this hotspot which is then displayed on the hotspot page.
So I need a field for them to quickly select the subscribed event of their choice for the hotspot they made at a given time.
Hope you understand
If you want you can download the app and try, it's called Cercle Business on iOS or android stores
If you have a better idea than a profile field for the same result I 'd be glad to have it