Social media for events you are interested in.
List all events you are interested in. Follow people and see what events they are interested in. Pass on events that look good and spread the word.
The place for organisers to sell/provide tickets and officially list their events. List any event you see you are interested in.
The place for a community to list events. Then you all have to agree what type of events should be listed and which shouldn't be - this is your own space to list whatever you want.
Also the Fediverse already has https://mobilizon.org/ , https://lauti.org/ and https://gancio.org/ for that. Also https://event-federation.eu/.
Privacy so only your followers can see events you list - we know not everyone wants to advertise what events they will be at!
A prototype was made from 2020 - 2021.