BENEFIT: Donna Sachet hosts White Diamonds -- Memorial for Elizabeth Taylor, which kicks off at the Castro Theatre with a screening of Cat on a Hot Tin Roof, a champagne toast, and a silent auction, followed by a fundraiser at Lookout Bar for the Aids Life Cycle. RSVP on Facebook. Additionally, tonight is the first of five nights of Elizabeth Taylor double features at the Castro to benefit Project Inform. (7 to 11:30 p.m., Castro Theatre, 429 Castro Street // Lookout Bar, 3600 16th Street)

PERFORMANCE: San Francisco Zen Center and RADAR Productions present The Worst Horse, a multimedia event featuring a line-up of Bay Area authors, visual artists, actors, and curators who were asked to create a new piece of work exploring Buddhist concepts that will be showcased to a live audience. Oddball Films will present a feature short film, Dream of the Wild Horses (Le Songe des Chevaux Sauvages), the Buddhist parable of the fourth horse that serves as the inspiration for the event. (7:30 p.m., San Francisco Zen Center, 300 Page Street)

DANCE: Emerging choreographers and young professional and pre-professional dancers show their stuff at the Alonzo King LINES Ballet Training Program Spring Showcase, which runs through Sunday, featuring a diverse range of works from Bay Area artists and a special guest artist from New York. (7:30 p.m., ODC Theater, 3153 17th Street)