SATURDAY MAY 1

The Master Singers present a night of Haydn and Beethoven with "'Lord Nelson' Mass" and "Choral Fantasy." Cary Hall, 1605 Mass. Ave., Lexington Center. (781) 862-6459. 8 p.m. $15.

Harvard students may not be film buffs, but there certainly are a lot of anime lovers peppering the Yard. Tonight, the MFA presents "The Adventures of Pipi," a 90-minute anime feature by Shinichi Nakada. The Museum of Fine Arts, 465 Huntington Ave. 267-9300. 10:30 a.m. $6.

Even if you've missed the rest of Take Back the Night week, you can still jog for a cause. Take Back the River Run closes out the week. Meet at the Weld Boat House. 11 a.m. FREE.

While you're ferreting out Boston's culture, consider "Abigail Adams: Remember the Ladies," a one-woman show. Boston Public Library, Roslindale Branch, 4238 Washington St. 323-2343. 2 p.m. FREE.

The Institute of Contemporary Art's "Collectors Collect Contemporary: 1990-99" showcases work from 26 of Boston's largest private collections and includes 70 works by 50 artists. ICA, 955 Boylston St. 266-5152. Noon to 5 p.m. $4.

Ooh. Ahh. Citystep. The show, not the dance. Cambridge Rindge and Latin High School, 459 Broadway. 496-2222. 7:30 p.m. $5.