A good number of people I know have left facebook for everything but the events. Its still the one central location where pretty much everybody is. I would love nothing more than a standalone events app that not only had future events, but a, 'hey, I'm at %location%, anyone want to meet up?' that allowed for multiple degrees of social interaction --- e.g. just friends, anybody.
This is the primary reason I use it. It annoys my girlfriend (who posts regularly) that I don't read what she posts (sometimes I do, but that leads to a time sink when I see everything else I've "got" to read). 99% of my use is to post event announcements, and respond to event invites from friends. If I could trust people to properly respond to emailed invites, I would, but most people I know have 1k+ unread emails.…
This sounds batshit crazy to me.
Honestly if my partner expected that of me and used it as a reason to be upset with me I'd be thinking of ending the relationship.