How did Beau and Jeff Bridges learn to look like they were pros for their film roles as piano-playing brothers in "The Fabulous Baker Boys"?

Pianist Joyce Collins, who makes one of her occasional nightclub dates tonight at Le Cafe in Sherman Oaks, and Lou Forestieri, who backs singer Lois Bolieau at the same venue Friday and Saturday, taught the Bridges brothers high-level lounge piano from September, 1988, to February, 1989.

"Beau was a wonderful pupil-he'd get up at 5 in the morning to practice," said Collins, who teaches at the Grove School of Music and whose latest LP is "Moment to Moment" (Discovery). We took it piece by piece, starting slowly and working up to tempo."

"Jeff is very talented, and has a fondness for all kinds of music, not just jazz," said Forestieri, referring to the Bill Evans-ish piano Jeff Bridges plays in the movie.

Both brothers studied a videotape that showed the hands of pianists Dave Grusin, the film's musical director, and John Hammond. Grusin and Hammond recorded the sound track, which was played back while the Bridgeses were filmed playing dummy instruments (which look real but make no sound), a practice called "sidelining."

In one scene, however, it is Jeff Bridges playing a moody, unaccompanied piece in an empty resort lounge.

"This music was very hard and they did a great job," said Collins, "and even though they sidelined, they still had to know how to play. I think they looked fabulous." No pun intended.