GREAT BRITTON Landscapes and portraits by the American painter James Britton (1878-1936) go on display today. Britton lived and worked in Connecticut, New York City, and Sag Harbor, L.I., and was known as an artist and a critic. Britton moved to New York at 17 to apprentice as an illustrator at Scribner’s magazine and to study at the Art Students League. Later, while living in Greenwich Village, he organized a group of painters and sculptors known as the Eclectics. As a critic for American Art News, he reviewed events including the Armory Show of 1913. Reception: Tonight, 6-8 p.m. Exhibit: Tonight through Saturday, April 29, Tuesday-Saturday, 11 a.m.-6 p.m., Nabi Gallery, 137 W. 25th St., between Sixth and Seventh avenues, free.

SERIOUSLY, FOLKS “Neo Sincerity: The Difference Between the Comic and the Cosmic Is a Single Letter,” a group show curated by Amei Wallach, is on display at apexart.The exhibit is organized around cartoonist Art Spiegelman’s proposal, in response to post-September 11 irony, for a kind of “neo sincerity.” It would consist of, in his words, “sincerity built on a thorough grounding in irony, but that allows one to actually make a statement about what one believes in.” Through Saturday, April 8, Tuesday-Saturday, 11 a.m.-6 p.m., apexart, 291 Church St., between Walker and White streets, 212-431-5270, free.

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