POP DATE BOOK

Tickets go on sale today for the Smashing Pumpkins’ concert on Aug. 21 at the Forum, and for Natalie Merchant’s June 13-14 Greek Theatre shows. . . . Tickets will be available Sunday for the Jethro Tull-Emerson, Lake & Palmer package, Sept. 21 at Irvine Meadows Amphitheatre and Sept. 22 at the Universal Amphitheatre. . . . The Monkees’ Peter Tork plays next Saturday at Highland Grounds in Hollywood. . . . Downset headlines the Palace on May 21.