Where to listen hi end systems in Manhattan?

In Manhattan, Innovative Audio, Lyric Hifi, and Sound by Singer are the big high end stores. None of them are very supportive of just stopping by to listen. Andy Singer is kind of off-putting if you don’t have an appointment.

You might do better seeing if some of the forum members want to show off their systems. Or go to one of the new audiophile bars-

https://tokyorecordbar.com/
http://publicrecords.nyc/

Yes, Audio Doctor has a really wide selection of things to listen to, you'd enjoy that. Dave's a nice, enthusiastic guy and his dog is a sweetheart. 

Oddly enough, I haven't been in one of the NY audiophile bars, but I have been in one in Tokyo, where that sort of thing has been around for a while.  (I didn't think the sound was any great shakes, however)
 https://www.residentadvisor.net/features/2724   

It's sort of an emerging phenomenon in the US, though-
https://www.bloomberg.com/news/features/2019-04-11/hi-fi-listening-bars-eclectic-music-epic-sound-at-cocktail-hour

I'm definitely going to check some out.  I'm an 'empty-nester' now, and I get to do stuff like that!