This will be different as I cannot OC a handgun legally. I do carry my ASP all the time.
I get in the center of everything, and engage in conversation with others. I do not slink (real word?) back and act quiet, as that might encourage potential criminals and might make them think this is the right place to start some trouble.
Change position frequently, changing stance, to stay balanced on two even if I am pushed or shoved from 6 clock.
And we, motorcycle riders as a majority have good eyes, and awareness! Anticipating actions and always looking for an escape route. I.E. If he does this, what if that happens, what if I do this, etc.
Probably got more, but I'll keep it short and not make it a rant.