"When I think about it, it's weird that we assume every event collection should be an attendance list. I think having the default "Attending," "Maybe attending" collections is enough to satisfy that use case, and doesn't mean we should label all uses as "Attendance lists." Especially with collaborative collections, I can imagine some like "events where band X performed with lineup Y" or "highest grossing events" or "highest attended events" (granted that last one kind of is an attendance list of sorts ). Or any collection where the events share some attribute about the artists/performers that might be interesting and either hard to store in MB or hard to search for." - bitmap