I think you're referring to a reception, but even then that's only a tradition in certain cultures, like Greek.
6 glasses in a bottle of Champagne
How many glasses to a bottle of sparkling wine?
Five glasses.
Just skip the glasses and drink straight from the bottle.
24 4oz glasses
give one bottle to the bartender
There are five servings (glasses) of wine in a 750 ml bottle of wine.
Champagne is a sparkling wine
Depends on the bottle size, but usually about 4 glasses.
Depending on how much you pour per glass, there are 10 to 12 glasses in a 1.5 liter bottle.
1 Litre bottle is approx 40 measures