I use different kits. Here's what I did for three recent and similar weekend holidays to NYC, taking a bus ride between DC and NYC, backpack and camera bag all over NYC. "If I bring it, I have to carry it," was my mantra. Getting around the city was a matter of walking and taking the subway. This last weekend I walked 26 miles in two and a half days; bringing all of my camera gear wasn't an option.
July 2014 for Manhattanhenge (sun setting through the urban canyons of NYC), I brought the 5DM3 with a 50mm f/1.4 for shooting the sunset. It clouded in the last minutes. No matter, the event was fun anyway. I also had the Sigma 12-24mm f/4.5-5.6 for shooting most everything else. While most of the shots with the Sigma were at 24mm, there are times when I shot at shorter focal lengths, including 12mm. Great kit!
September 2014 I brought my G16 (effective 35mm fl, 28-140mm). The only weakness was when I was in really dark locations (the Cathedral of St. John the Divine - I love photographing elaborate churches). Whereas the 5DM3 can easily work very high ISOs, the G16 reaches its practical limit at ISO 6400. No matter, the G16 did a great job.
June 2015 (last weekend) I brought my 5DM3 and the 24-70 f/2.8 and the iPhone. I mention the iPhone as I was able to use it and get a rather nice photo of Manhattan from Brooklyn (https://photography-on-the.net …showthread.php?p=17590821). My only issue with the 5DM3/24-70mm was that I should have stayed fully manual. I actually backed off and went Av, aperture priority. A few shots were at slow shutter speeds and were, uh, challenging.
Why the different choices? For the July '14 trip, I'd looked at 500px.com to get ideas for shooting Manhattanhenge. The 50mm seemed the right focal length. The Sigma I brought because I wanted to shoot up and see the converging skyscrapers. The September '14 trip was grab-n-go and traveling as lightly as practicable. Also, we were planning a family vacation that included a cruise. Could the G16 do a respectable job of taking family vacation photos? NYC was the proving ground. Answer? Yes. Last weekend was a matter of having a fast zoom where I could isolate subjects with DoF. There were lots of complications regarding trip logistics, but in the end it was The Brick (the 24-70 Mk I) and it did a fine job. I choose what I want to photograph and pick the kit from there.
I have a Canon ELPH 330 and would shoot NYC with that. The ELPH 330 is a tiny pocket point-n-shoot, but it's a fun little camera and can take respectable photos, and it is good to ISO 3200. I've done DC with it, and I'd do NY with it if that was the best option. While there are things it can't do, there are things it can do that my 5DM3 and my best lenses cannot.
Hope that helps!