Pongo Etiquette
Whilst I agree that the banter is absolutely a must, and amusement factor on this thread is excellent, one takes such matters lightly at one's peril, specifically if the "at home" is an ill-disguised vetting process.
One of our judicial brethren recounted a discussion at the local pony club meet with Col X, who, in full tweed ensemble, discoursed on his method. Any officer wishing to join the wegiment was invited to an "at home", if the answer to the "will you have a drink" was anything other than a curt "Aaah, Gin and tonic", with no flowery additions, was blackballed - and that was within the last 5 years!!
MM beware!
Now where are my cavalry twill trousers, and tattersall check shirt?!