No, you don't have to order food at the champagne bar but you can. I'm not sure about getting in at all without a reservation though. Also, the night we were there it was packed by around 10:30 or 11, and there was no way to get a seat at the champagne bar unless you were very lucky. We got there a little earlier than that.
Yes, but I came here for an argument.
Oh! Oh! I'm sorry, this is abuse.