We experienced it yesterday, but I can't say what was open other than RSR, because we went immediately there, were toward the front of the queue by 7:15, and proceeded to wait there until they finally got it running just before 9!
The titel says "EMH", and I had no idea what that stood for which is why I asked. But never mind...I googled it. Extra Magic Hour for others who don't know. Or am I the only one?