This weekend: Zombie-killing demo, Tom Petty tribute, roller derby ball

Zombies! Author Roger Ma and graphic artist Y.N. Heller (*The Zombie Combat Manual: A Guide to Fighting the Living Dead*) give a lecture on how to kick zombie ass, complete with a zombie dummy beat-down demonstration and zombie make up for those who want to join the undead. Barnes and Noble Park Slope, free.

7:30pm: Independent music community Local Correspondents host a live-band tribute to Tom Petty. Bar 4, free.

Buy one get one free footlong sub during Subway’s Customer Appreciation Day at one of the chain’s kagillion+ locations in NYC.

10am-5pm: After a long winter, the Brooklyn Flea returns to Fort Greene’s Bishop Loughlin High School yard on Saturdays, remains at One Hanson Sundays for the remainder of the year.

The Brooklyn Symphony Orchestra tackles John Williams’s music from “Close Encounters of the Third Kind” and “E.T.” as well as Holst’s “The Planets” and Strauss’s “Music of the Spheres.” Followed by a reception and free refreshments. Church of St. Ann and the Holy Trinity (Brooklyn Heights), $15.

7pm: New skaters get assigned to their teams at the Gotham Girls Roller Derby‘s annual blow-out: The Derbytaunt Ball. Free Brooklyn Brewery suds 7-8pm. Public Assembly, $10/adv, $13/door.

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