San Francisco Ballet Auxiliary's 75th anniversary Nutcracker festivities continue with its Snowflake Soiree, chaired by Rochelle Lacey. After a 7 p.m. Nutcracker performance at the War Memorial Opera House, guests will enjoy a night of music, creative cocktails and delicious hors d’oeuvres at the Zellerbach Rehearsal Hall, all to benefit the ballet's artistic and community initiatives. Ticket packages range from $300 to $450. For more information, go to sfballet.org.