"ordinary" people buy a pint of real ale out of curiosity. If their first reaction isn't one of "get that the fuck out of my mouth and get me a Carlsberg now I'm gonna throw up" then you have a Real Ale Drinker"
The above is a quote from a (Belfast based) site I stumbled across. Having said in an earlier post here, how you spot beer tickers, I was pleased it includes this rather handy guide to spotting real ale drinkers, complete with accompanying stereotypical photo. It is rather funny and has, like all good yarns, more than just a smidgen of truth in it.
PS. Does anyone use the term "real ale" as a matter of course any more? I always use "cask" as my preferred descriptor.