What I was initially looking for was something to back up the claim "it takes a week to recover from a night of serious drinking.". Niels is arguing that this could be true for alcoholics with DT. While I wont argue that, I don't think the original statement was referring to alcoholics, but rather anyone who goes out for a night of serious drinking. I haven't seen any proof for the original statement.
I'm not a doctor in any way, shape or form, but I would still like to argue the running point in Niels' second post, alcohol is a bad idea.. Overconsumption, yes, but that's true for almost anything. I don't think smaller amounts is a bad idea -- on the contrary. I recently heard a statement that the UK recommended limit (21 units per week) was just made up, and studies have shown that you're more likely to live longer if you drink around 40-50 units per week (somewhere after that number, the life expectancy starts dropping and goes below the life expectancy for people not drinking). I'm afraid I can't remember where I heard/saw it though, so I'll have to leave a  for myself for the time being.
Are active, stress-free people more likely to have a drink with dinner, or is a drink with dinner helping to relieve stress?
I quite enjoy having a drink after work, especially if it's been a lot of pressure during the day. It helps me relax, disconnect from the work situation. A couple of beers and non-work-related chat will take my mind off any stressful work I've been doing, which could otherwise carry on in my mind throughout the night.