ACTRESS Pat Carroll and other members of the Shakespeare Theatre's "Merry Wives of Windsor" troupe, including Folger favorites Fran Dorn, Floyd King and Ed Gero, will read poetry by Shakespeare to benefit Operation Love, a charitable organization that feeds 6,000 homeless and needy people in the Washington area each week. "Shakespeare for the Homeless" is Monday at 8 at Georgetown University's Intercultural Center auditorium. Tickets are $25; call 587-4974.

GALA Hispanic Theatre is among the troupes from Latin America, the United States and Canada participating in a Spanish American Theater Festival at the Hartke Theatre of the Catholic University of America through Saturday. On Friday at 8, you can catch a bilingual (French/Spanish) performance of Chilean playwright Alberto Kurapel's "Carta de Ajuste Nous N'Avons Plus Besoin de Calendrier" by Montreal's Compagnie des Arts Exilio. And GALA presents "La Secreta Obscenidad de Cada Dia" by Chilean playwright Marco Antonio de la Parra on Saturday at 8. Call 319-5240.

THE NATIONAL March for Animal Rights steps out from the Ellipse at 10 a.m. this Sunday, and New York actress Rae C. Wright is coming down to get marchers in the mood with her one-woman show "The Rabbit's Revenge," Saturday at 3 at Source Theatre, 1835 14th St. NW. Wright's four vignettes combine humor and horror as they touch on aspects of the relationships between humans and nonhumans. Call 363-4490.

SOURCE Theatre is closing its Main Stage production of "Women & Wallace" this Saturday (three weeks early). Replacing it will be Source's Late Night feature, the surprise hit lesbian-noir-pulp-slapstick comedy "The Well of Horniness." That means "Well" now moves into the 8 p.m. slot Thursday through Sunday (there will still be an 11 p.m. show on Saturdays) and continues through June 30. Call 462-1073.