Facebook doesn't provide an option of content feeds for Facebook events at the moment. Only feeds of Facebook pages and groups are available.
In RSS Ground you can generate content feeds of public Facebook pages. And you don't have to own the page.Read how to search for relevant Facebook pages
To generate a content feed of a Facebook group you have to participate in the group and RSS Ground app has to be added to this group. Most likely, to meet these conditions you have to be an administrator of the group, but this is not a must.
Learn how to add RSS Ground app to a Facebook group