I'd like to be able to subscribe to notifications of all scheduled events for a chat room. For example, I'd like notification of all events in the SE Podcast Live Chat room without needed to re-register each week or each time it's rescheduled.
Listing such users are "registered" would be misleading so they probably shouldn't be, or should be listed separately. In my case, I'd also like notification of each of Gaming.SE's Game On! events, but I wouldn't like to be listed as "registered" because I'm unlikely to participate in many of them.