How much Champagne do I need to cater for my function?
In general, you can expect that for 100 guests you would need 32 bottles of Champagne to be served with your amuses-bouches, and for toasting, aim for 20 bottles per 100 guests. Of course, this is dependent on many factors, including how much alcohol your guests usually drink and what other drinks are available. For a more accurate estimate, you can use this handy drinks calculator.