I have experienced this many times. First let me put the disclaimer : Drinking is injurious to health :) and I am not a addictive alcoholic, I just drink occasionally < Disclaimer to Disclaimer : I have no control on how often I find myself in such occasions ;) > There is some difference in the chemical composition of beer and other manifestations of alcoholic beverages ;) I have experianced it multiple times, on nights I drink just one paient of Beer before sleeping, I am bombarded by dreams.. not one but multiple dreams. However on days I drink Whiskey or Wine or Brandy I hardly dream. Is it the hops in the beer or some residual yeast. 99.9% of my dreams are happy dreams so I enjoy this. I have tied to google and find if other people have experianced somthing similiar , but I could not find anything on Google.