Hard to answer for me. I've opened half bottles of 1953 Petrus for my wife and me. I've opened Imperials (6 liters) of 1979 Pichon Lalande and 1979 Leoville Las Cases for groups of 40-50. Assuming you're talking about a 750, it depends on the occasion. It could be for our anniversary and just the two of us, or it could be for a group at an offline. I would hate to open a special trophy bottle, like a DRC, for more than 6 people.