Surviving “Housewife” LuAnn de Lesseps went down for the countess after dancing on a table. The reality star and self-proclaimed manners specialist tumbled, Snooki-style, off a tabletop at ex-model Debbie Loefflers birthday at uptown restaurant Desmond’s when she busted an over-exuberant move to Katy Perry’s “Last Friday Night.” The countess, who survived the New York housewives cull which saw Jill Zarin, Kelly Bensimon and Alex McCord axed, cut her knee at the bash where comic pals Linda Smith, Josh Spear, Vince August, Bill McCuddy and Carolines on Broadway owner Caroline Hirsch mixed.