I would be afraid that I'd attract all the locals that had been 86'd from every other bar in town, thinking that we were letting them know it was a safe haven for ruffians. I guess that could be your plan...
I've heard a few different explanations of where the term came from, but my favorite is that it started as
Cockney rhyming slang. Not sure the whole rhyme scheme but the idea is that '86' rhymes with 'nix'.