San Francisco Opera will hold its annual simulcast from Civic Center in AT&T Park this Friday, June 5. This year's piece is Puccini's three-act drama Tosca, a sordid tale of deception, sexism, and betrayal, complete with a love triangle! Admission is free, but if you RSVP ahead of time, print your ticket, and remember to bring it, you'll get "preferred" admission starting at 6:30 while the general public waits until 7. Pre-registering is also your best shot at getting a seat on the field. Show starts at 8(ish).