Please tell me where I can enjoy high tea service in Manhattan.
Lady Mendl's Tea Salon. One of the loveliest tea salons in Manhattan with old world charm. The service is gracious and accommodating with an excellent selection of teas, properly steeped and served at perfect temperature.
Lady Mendl's Tea Salon
56 Irving Pl, New York, NY 10003
I assume you are referring to afternoon tea, and not high tea (http://en.wikipedia.org/wiki/Tea_%28m...). If that is the case, most of the better hotels serve tea. Among my favorites are the St. Regis and the Ritz Carleton, Central Park South. Other hotels to try are the Plaza and the Pierre. Also, on the Upper East Side you can try King's Carriage House, which is very nice.
Demo5 is quite right. The posh tea service one has around 4pm is called "afternoon tea" or just "tea", tout court. "High tea" is used in America by Americans wanting to sound posh, but high tea is really a rather low meal. It is working-class supper, usually consisting of meat (a chop or some such), veg, dessert and of course tea.