Many of the party guests were practically out her door when Laurie Anderson remembered something. "Posters! I forgot to give you guys the posters," said the artist with the zeal of a mother who just realized she failed to pack the cookies.
Anderson and an assistant began scooping up armfuls of white cylinders containing artful promotional materials for her new movie, "Heart of a Dog." Earlier in the evening, Anderson's apartment overlooking the Hudson had been speckled with downtown luminaries such as Richard Gere and the artist-director Julian Schnabel, but it was now mostly filled with a mix of indie-film types. They took the posters.