Im not going to say how or what I used to do in NYshitty, I have not been there since 2003 and will not be going back, ever. But what I will say, is when I do go to any big city, I ALWAYS have my cane.
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I have a the "C" handle, the "T" handle and the Ball handle, I always carry it when ever Im not "allowed" to carry my gun. I have gone to many theater shows, RV shows and other venues that don't allow weapons of any kind, and it always is allowed in. Just walk like you're about to fall over, LOL works everytime