OP here with an update. Since I last posted I skipped 80's night. I had no contact with OM since the last time I had been there and he approached me prompting my original post. Today when I open up facebook (must have not have fully blocked him, stupid privacy settings) I found Om had sent me the following message:
"I was unaware at the the time. I am sorry and i am apologizing for what I did wrong, back then. at times I acted too close, too serous. I probably made you tense and i eventually felt hurt and took it out the wrong way. I felt like an old man in the way. It was a very bad feeling for me. I went overboard. I met you at the wrong time. I was under the influence of a bad experience and the bad aura "spilled over."
However, I was an influence. Because of me, you became a regular at Billy's, met b, found area to hang with and got to about some good bands. I am te one who convinced you to become a Starfarm "like". You still respond to Starfarm posts. I wish that we can focus on the good and forget the bad. It would make encounters less stressful."
Billy's is the name of the club, B is our mutual friend. This part is true as he did introduce us. Starfarm is a band that he did introduce me to as well. However I was attending 80's night at this club before I met him. So now I think it's time to put this into effect followed by ignoring. Even if it means I can't hang with B while OM is around.
Because so often the onlookers don't understand "the crazy"--they didn't experience it, they can't fathom it--there's a risk that the OP will end up receiving pressure from other people to "stop being so rude."
I'd go for saying, "Look, I do not want to talk to you or be friends with you. I can't stop you coming to the bar, and I don't intend to harass you in any way. But I do NOT want to have any sort of relationship with you. I have made this clear to you before. Leave me alone. Do not YOU harass ME."
That sounds a bit less curt to anyone who might hear her. But it's still pretty damned emphatic, and there is no JADE-ing.
So I'll send that response back to him, update my settings on facebook, and continue with the cut direct. Now all I'll need is responses to tell B when he asks why I'm not sitting with him.