Bottled water in general. If it's tap water, never with ice, especially at the beginning since whatever pathogens around will be enriched in the ice maker if the establishment isn't cleaning it regularly. If I'm around long enough, maybe a week, I'll probably find out whatever precautions the locals take with the tap water and follow suit.

It's generally fine in major US cities, but do check. It could be anywhere from Flint Michigan water to unregulated well water to being somewhat famous for its purity in the case of NYC. I've lived a few years in a town where the water doesn't pose a health hazard, but the bad taste made everyone buy filters.