- The Knickerbocker Greys cordially welcome you to the 1999-2000 Season of New York's Cadet Corps since 1881 Seventh Regiment Armory 643 Park Avenue at East 66th Street New York, NY 10021 (212) 585-1881 New Webmasters Take the Baton! Along with the new millennium come some exciting changes here at the Knickerbocker Greys web site. This rejuvenated online home for the Greys, so ably created by the ...www.knickerbockergreys.org