There are many organizations that maintain lists of upcoming scientific meetings and conferences. If they could use this software that may help in making the database of meetings much more complete and event recommendations more useful. I presume your normal use-case is that the organisers of an event put the event in your system and can be reached by (potential) participants. That is quite different. I am building a system for the open post-publication review of the scientific literature by scientific communities. https://grassroots.is/ It would make sense to give these communities the possibility to also share meetings with each other, just like they could make lists with links to code, data, etc. It would be beautiful if people could not only see the meetings that belong to such a scientific community, but that they also could get recommendations about related meetings/events.