Universally admired as one of the most adventurous pianists to arrive on the jazz scene in years, Brad Mehldau leads his trio in two appearances this weekend.
* Brad Mehldau Trio, Knitting Factory Hollywood, 7021 Hollywood Blvd. 8 p.m. $17 (guaranteed seating available with additional $15 food-drink minimum charge). (323) 463-0204. Also Saturday at Cal State Northridge Performing Arts Center, 18111 Nordhoff St., Northridge. 8 p.m., $15. (818) 677-2488. 8:30pm
8 pm: Dance
Husband-and-wife experimental dance artists Eiko and Koma specialize in dreamlike transformations of time and physical reality. In their full-evening ritual "When Nights Were Dark," the result is what the New York Times recently called "the season's most imaginative production," a life cycle performed to an a cappella score by Joseph Jennings and incorporating a revolving set that glows from within and assumes almost as many different shapes as the dancers themselves. "Time takes on a different meaning at an Eiko and Koma work," commented Newsday, "and you have to be ready for that." Translation: No flash, no fireworks, but a constant, unearthly shimmer.
* Eiko and Koma in "When Nights Were Dark," Japan America Theatre, 244 S. San Pedro St., L.A., 8 p.m. Also Friday and Saturday, 8 p.m. $9 (students, seniors) to $28. (213) 680-3700.