I have a dilema.
I put this in BS: as i feel it's not strictly musicially related, although in a way it is.

I host every Tuesday, a session in our local pub, where friends and other musicans, and so on, are all welcome to join in the merriment, and we generally have a good time, but of late a curse has befallen us. A young chap (20) has moved to town and insists on coming to the session every week. Now PLEASE do not get me wrong, I believe all musicans good bad or indifferent, professional or amateur deserve the right to display the fruits of their musical ability, and no better place than a session for such. His weapons consist of Guitar, whistle Bodhran and when drunk, the banjo. Problem being the dear chap has not got one ounce of musical ability in his body. He carries no sense of timing, No sense of order or politeness when others are performing, And generally upsets and destroys what could be a good night.

We have politely corrected him, suggested subtly about "leaving the instrument down for this one" and all other polite suggestions, which fell on either deaf or totally stupid ears, as the situation has not changed he has thrown us out of sets totally, making us hang tunes in mid air, and is becoming a real nuisance. Of late i have had a few stern words with him, which sink in for about an hour but then all is forgotten. I really need a failproof method of letting him know that he is not really welcome,without hurting his feelings too much

I KNOW this has to have happened to others, and just wondered if you would have any thoughts on the subject

I remind you again, I fully support young, up and coming and learning musicans but this chap really is a special case.