You won't find that many places that are all inclusive in Europe anyways. The reason Mexico, etc.. can get away with it is they have ridiculously cheap labour, food, and booze. When things cost 4x the price in Europe, it's hard to make it economical.
Although it might exist in parts of Eastern Europe, I'd be shocked to see an all you can drink vacation offered for a reasonable sum in Europe.
Like others have said, much of Europe has cheap (by our standards) good booze to buy locally. You're much better off sampling that than drinking from a Marguerittaville for a week.
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