Amsterdam, Netherlands
Of course drinking at the Heineken Brewery tour. I understand now that they have changed the tour and have made it more restrictive. Back in 1996 they gave you a guided tour and afterwards you ended up in a beer hall where it was all you can drink for thirty minutes or until the next tour came through. Since I was on the last tour group that day we were given an hour. That was the best one hour I had on my Europe trip!