Champagne by its very nature is designed to attract attention. The loud pop of the cork, the stream of fizzy liquid, the clinking of glasses during a toast. These are all great during a wedding, graduation, or parole party, but during a movie, they are all unwanted distractions. Plus, unless you’re sitting in the front row, there’s a chance you could hurt someone with a flying cork. Plus, considering the proper way to open champagne is with a sword, you might get busted for taking a weapon into the theater.