Depends on the time of day and my plans for the day after. If I'm arriving on a work trip then I'll have a couple of glasses of wine in the lounge and then onboard one or two with dinner, then head down for the night and sleep. If it is holiday or a non-work day, I'll have a little more. If I'm flying CE then will obviously have a bit more, but in ET I'm not going to shell out more than once the 4.60 for a bottle of wine. If I'm travelling with a friend, we may up the quantity a bit, but that's just the same as going out for a night.