My venue is a private, family-owned estate so we can kind of do whatever we want. We're having an open bar and we're having taco grills brought in to do the catering. I haven't asked them if they do champagne service yet, but I will.
As a side thought, I imagined a bottle of champagne on each table in an ice bucket, with an empty champagne glass at each place setting. That way if they want to have champagne for the toast, they can pour it themselves. Is this a super tacky idea? I know some places do wine bottles on the tables, so I don't see why I can't do champagne on the tables, too!
I have to serve 200 guests and having 200 champagne glasses filled sounds like a hassle when people probably wouldn't think twice about pouring it themselves.