A build-your-own champagne bar with sparkling wine, mixers, syrups and garnishes, so guests can pour exactly the glass they want. One bottle pours four glasses.
One bottle pours four glasses — count the glasses rather than the guests, then buy one more bottle than the maths says. Garnishes can be prepared the morning of and kept covered in the refrigerator. Pour sparkling wine down the side of a tilted glass to keep it from foaming over.