In amsterdam you can only buy weed in licensed cafes which arn't allowed to serve alcohol.
So in england I binge drink and get waaay to drunk. When I went to amserdam I drank about the same amount but it was spread around the day because of frequent cafe visits. So I didn't get anywhere near drunk at all.
I don't know about the US, there is a bit of an alcohol problem here that some weed would sort right out
