I grew up in Manhattan and I would agree that although there are venues in NYC that require more formal dress, casual is usually not an issue. I always loved the fact you could walk into a high end store on 5th avenue and usually they don't care how your are dressed. Sometimes the person that's dressed casually is the one that's going to pull out the centurion card and drop $100k. Very different than other places in other states I won't name where I have not had the best experiences...