Here in new york is good costume to walk on the right on the sidewalk.
Streets are very crowded here, and there are a lot of tourists as well, but for us who live here, and got to go to the office or in a hurry, it's important to keep on the right side of the sidewalk to prevent bumping into each other all the time thus slowing down the flow of pedestrian traffic and with a great chance to increase interracial middle-of - the street fights......
I am European, but I still get pissed off when I try to go to work ( always late, always at the last minute ) and bloody tourists block my way ! ( I love tourists by the way, especially females tall and blond from the north
).
But when there are no sidewalks, and you are forced to walk on the street side, I've been thought in the driving school that it's always good to walk in the opposite direction of the traffic, so if the cars keep on the right you should walk on the left and vice verse .
The reason for that is that by keeping an eye on the upcoming cars toward your direction, there is a chance you might prevent an accident if the drivers doesn't see the pedestrian, while if the car is coming from beyond you, there's very little you can do if you are going to get run over.
So as you can see, side matters !