As an experienced sommelier and brewer, I can offer some guidance on how many bottles of Champagne you will need for a toast with 20 guests. First, it's important to note that when serving Champagne as a toast, you typically pour about a third of a wine glass, which is equivalent to a tulip glass or a Champagne flute.
To calculate the number of bottles needed, we can assume each guest will have one glass for the toast. So, if we have 20 guests, we can estimate that we will need 20 glasses. Since each glass requires about a third of a bottle, we can divide 20 glasses by 3 to get the number of bottles needed.
20 glasses / 3 = 6.67 bottles
Now, it's important to round up to the nearest whole number, as you can't have a fraction of a bottle. Therefore, you would need to have at least 7 bottles of Champagne for the toast.
However, keep in mind that this calculation is based on the assumption that each guest will only have one glass for the toast. If you anticipate that some guests may want more than one glass or if you want to ensure that everyone has enough, it's always safer to have extra bottles on hand.
In my experience, it's better to have more Champagne than you think you'll need, as it's always better to have extra than to run out during a celebration. Champagne is often enjoyed throughout the evening, and people may want to have additional glasses beyond the initial toast.
Additionally, it's worth considering the duration of the event. If the toast is just a brief moment and other beverages are being served throughout the evening, you may be able to adjust the quantity accordingly. However, if Champagne is the main or only beverage being served, it's wise to err on the side of having more bottles.
To summarize, for a toast with 20 guests, it's recommended to have at least 7 bottles of Champagne on hand. However, depending on your specific circumstances, it may be beneficial to have extra bottles available to ensure that everyone can enjoy the celebration to the fullest. Cheers!