My suggestion: take a crash course in etiquette by going to another city nearby, and then spend a few days walking around asking questions, or inviting people to do stuff with you, etc. Condition yourself to get used to the occasional weird look, learn what you can get away with, and possibly make friends with people you would otherwise never meet. If all else fails, drive out of the city and pretend the entire thing never happened. Or you will get some amusing stories to share with me when you get back. How can you lose?

I am only partly joking, my social skills are so mediocre I have seriously considered doing exactly this at some point. I might throw in some speed dating as well for good measure.