1. Warren Tricomi — Madison Avenue, Manhattan
The closest thing New York has to a full-service luxury beauty house, and one of the few that still does nails.
Warren Tricomi has been running since 1989 and its Madison Avenue salon is the flagship, with sister rooms in Greenwich and Sag Harbor. The draw is range: it is one of the last addresses in the city where cutting, color, bridal work, brows and nails are all in-house and all held to the same standard, so a wedding morning or a pre-event afternoon can happen in one chair rotation rather than three appointments across three neighborhoods.
That breadth is also the reason it leads this list. New York has plenty of excellent single-discipline rooms, but very few that can take a nail appointment seriously alongside a color correction. If you are trying to replace a closed nail bar with something reliable, this is the straightforward answer in Manhattan.
Good to know: Book by artist rather than by service — the salon prices by seniority, so the same blow-dry costs quite differently depending on whose chair it is.