It may have rained on ADD Arts' parade a week ago Sunday, but you wouldn't have known it from the mood of the 40-odd performers, organizers and revelers who gathered at d.c. space that afternoon for poetry readings a` la '60s coffeehouse.

"So it rained; it's a disappointment, but hey, it's a great day to be alive," said Ray Melrose, d.c. space's manager. And at least the kickoff concert the night before was a success, with a crowd of about 500 laughing and dancing, despite the rain, to the music of the Orioles, the Shirley Horn Trio and the Gary Thomas Quartet.

The festival's outdoor events were canceled, but a smaller version of the festival, including the Graffiti Wall and the kids' chalk drawing contest, will be rescheduled for sometime in October. "It will be a real family event," predicts Pam Christensen, spokesman for District Curators, which sponsors the event.

Arty Party

Cities, the Adams-Morgan club that looks like the ruins of a Greek monument, was the site of an oh-so-chic postopening party Wednesday for artist G. Byron Peck, known for his colorful murals adorning the inside of Cities as well as the outside of the City Cafe and the Bank.

When they weren't dancing, partygoers could watch continuous slide shows of the works in Peck's new installation at the Govinda Gallery in Georgetown.

His photo collages feature strikingly pretty women. The innocent blond in a flowered dress sitting on a stone bench, portrayed as a double image in "Dumbarton Oaks," is someone he met right there in the park. The model for "Janis," the large photolike painting in the exhibit, "just came into my studio. It's real casual, no big deal," Peck said.

Art and Vietnam

"War and Memory: In the Aftermath of Vietnam" is an ambitious show that has pulled together art, films, photography and literature relating to Vietnam. It opens Thursday at the Washington Project for the Arts, 434 Seventh St. NW, and runs through Dec. 19. The WPA has planned an extensive schedule of seminars, films and speakers focusing on Vietnam's effect on everything from rock 'n' roll to the family. Information is available at 347-4813.

This Week

Ah, shiver me timbers! It's the Boarding Party, with its salty music from the sea, tonight at 8 at the Takoma Park Cafe, as part of the cafe''s Monday night fall concert series ... This is National Hispanic Heritage Week, and the Library of Congress celebrates on Tuesday with a free performance by the Gibaro de Puerto Rico ballet at 12:45 p.m. ...

At 8 p.m. Wednesday at the Smithsonian's Baird Auditorium, author Toni Morrison will read from and talk about her new book "Beloved" ... Thursday night the Castle Arts Center remounts "Quilters," winner of last year's Helen Hayes Award for Best Resident Musical. Word has it they've made some changes in the set, and juggled the roles among the original cast members ...

Big band music and ballroom dancing: they're back, at the Bethesda Metro Center's Plaza. This Friday (and next) from 6 to 9 p.m., swing to "Chattanooga Choo Choo," all for free ...

If your friends have ever urged you to put your act on the road, you might travel to Javarama, at 14th and T streets NW. Every third Saturday Bart Whiteman's coffeehouse opens its stage to musicians, performance poets, comedians, dancers and actors, beginning at 10 p.m. ...

Saturday and Sunday, Indian jewelry, sculpture, crafts and antiques will be shown and sold at the Indian and Western Art Show at Armory Place, 925 Wayne Ave., Silver Spring.

SoHo in Tokyo

Last September Japan's Prime Minister Yasuhiro Nakasone was in hot water for remarks about American blacks. And now, a year later, an art show featuring several prominent Washington-area artists is opening in Tokyo's SoHo-like harbor district. A coincidence? "No, this is not a reaction to the prime minister's remarks," says David Jackson of Overseas Promotions Inc., the Japanese-owned company that is sponsoring the show, "The Art of Black America in Japan," which opens Thursday. The show includes a retrospective of Afro-American modernists from 1937 to 1987, which has been curated by David Driskell of the University of Maryland. Area artists represented include Sam Gilliam, Lois Mailou Jones, Sylvia Snowden, Keith Morrison, William H. Johnson and Norman Lewis.

Collecting

The Torpedo Factory Art Center in Alexandria is offering a hands-on workshop on the basics of acquiring, caring for and displaying an art collection. The two-day program will take place Oct. 9 and 10. To register, call 683-0693 ... But do you really want to get into that? Isn't the art world just a big game? Now it really is: Quartet: The Art Collecting Card Game from London's Tate Gallery is reportedly the hottest thing going in New York. There are four paintings for each of the artists represented, and the object is to scoop up the most complete collections. So far the $18 game is exclusively available at the Sointu shop in New York, where it's been selling like Hockneys -- oops, hotcakes.

Cheap Thrills

Arena Stage is offering a new program of student discounts -- low-priced matinees and half-price tickets for regular productions of such shows as "Joe Turner's Come and Gone," Chekhov's "The Cherry Orchard" and "All the King's Men." For information call 554-9066 ... The Smithsonian is looking for docents to lead tours through the elegant new Enid A. Haupt Garden. For further information call 357-1926.