Well I started using it...I don't see anything about bands or music pages you can "like", but there are things called "Sparks" that you can subscribe to and when you click on it, it'll post some pages/sites about the topic. For example, I added "Final Fantasy" and "Game of Thrones" to my Sparks. So now when I click on each of those, it'll take me to a page with a bunch of other sites talking about FF or GoT. Not sure if I'm explaining it well.....

I don't have enough friends using it so it's pretty uneventful right now. As far as something similar to FB events, I transitioned over from using FB events to using GCal and sending out events through there. I pretty much use Google Calendar now for everything and have it synced to my smartphone so I always know what's coming up and what I have to do.