Veteran jazzz musicians Jim Hall and Bob Brookmeyer have worked as a team several times in the past 20 years and their playing shows it.

In their Sunday-night opening at the Cellar Door, Hall and Brookmeyer glided smoothly through a mellow set that relied on classical standards. In "Baubles, Bangles and Beads," and "Darn That Dream," the melody and harmony lines were easily alternated between Hall's trombone and Brookmeyer's guitar. The two also managed to weave their own understated interpretation in the Charles Ivesinfluenced "New England Hymn," and in several Sonny Rollins tunes.

Opening the set was Beverly Cosham, an incredibly versatile singeractress who is a native of Washington.

Cosham appeared in musicals and area dinner theaters for many years before recently breaking into the major club circuit. After a well-received engagement at the Hayloft, Cosham packed Blues Alley and went on to open last month for Dobie Gray at Cellar Door.

Cosham's Streisand-Shirley Bassey, big-voiced wailing style is perfect for tunes such as "You Will Be My Music" and Stephen Sondheim's "Losing My Mind." Her many years of stage experience are apparent in a comic "Legalize My Name" and a dramatically intense "This Is My Life." Her bluesy "Don't It Make My Brown Eyes Blue" was in contrast to whispered "Send in the Clowns." The act continues through tonight.