Big-voiced Mary Testa, the actress who landed so strongly in 1998 in William Finn's A New Brain and the Public Theater's revival of On the Town, is entering the final weekend of a monthlong cabaret engagement, Haile, Mary!, with pianist-music director Evans Haile, through Mar. 6 at the Garrick in New York City.

Performances continue 9:30 PM Mar. 4 and 10:30 PM Mar. 5-6. A cover charge and meal minimum are required. Shows began Feb. 5 as part of the Garrick Gaieties series at the Garrick restaurant in the Mayfair Hotel (242 W. 49th St.) in midtown Manhattan.

Testa and Haile, with Andrew Gerle on a second piano, perform songs by Harold Arlen, George Gershwin, Rodgers and Hart and Ernesto Lecuona, among others.

Scott Perrin, producer of Secrets Every Smart Traveler Should Know, is the producer for shows at the Garrick.

Testa played the tipsy, dipso Madame Dilly, often stealing scenes in the Public's On the Town at the Delacorte in Central Park and at the Gershwin Theatre. She was the homeless woman in Finn's A New Brain at Lincoln Center Theater's Mitzi Newhouse in summer 1998, and was Domina in Jerry Zaks' revival of A Funny Thing Happened on the Way to the Forum. She also appeared in Lynn Ahrens and Stephen Flaherty's Lucky Stiff at Playwrights Horizons. Haile is a frequent conductor with international symphonies. He also musical-directed studio recordings of Babes in Arms and Cole Porter's Fifty Million Frenchmen.

Gerle has accompanied Kitty Carlisle Hart, John Raitt, James Naughton and Jo Sullivan Loesser. His original musical, Kepler, was a finalist for the Richard Rodgers Award.

For information about the Garrick shows, call (212) 489-8600.

-- By Kenneth Jones