My client is a social advocacy org, they heavily use the event module but for specific events. There a LOT of meetings where they would like to track attendees and not put those w/the events. The church management small groups info I found searching for options for them looks like it would be extremely useful. I would think for other non-profits you could use this tool to manage board meeting attendance and event committee type work as well as social advocacy. Basically, tracking the work done to put ON the event (and there is a ton and the volunteer module is limited to just volunteers, which is not always true w/those types of folks). There is nothing else in RE that can really do this, ESPECIALLY with webview functionality (which is where my client wants to do this in to get buy in and usage from their teams of RENXT).