All Halloween-ed out and it's only Thursday? Here's what else is happening this weekend.

Swan Lake at the Palace of Fine Arts

WHAT: The Russian Grand Ballet is sweeping to the SF stage with the beloved ballet Swan Lake. This is the European ballet company's last leg of its U.S. tour, and they're only performing at the Palace of Fine Arts for one night—so grab tickets while you can!

WHEN: Saturday, Oct. 29, 8pm

WHERE: 3301 Lyon St. (Cow Hollow), russiangrandballet.com

SF Opera Lab Pop-Up at Oasis

WHAT: Discover your own Julia-Roberts-in-Pretty-Woman appreciation for opera at "Drag Queen at the Opera"— a fun, pop-up party hosted by drag legend Heklina. Bring dance shoes for a DJ-ed night of dancing, costuming, and cocktails following jaw-dropping shows by SF Opera stars.

WHEN: Sunday, Oct. 30, 8pm

WHERE: 298 11th St. (SoMA), sfoasis.com

Creatures of the Nightlife at Cal Academy of Sciences

WHAT: Okay, this one's a little spooky: Cal Academy of Sciences is spinning together mad science, a drag show, and a costume contest hosted by Peaches Christ for one epic night inside the museum. Each bar station will serve a different craft cocktail imagined by their resident mixologist, DJ Omar will be spinning tunes on the dance floor, and you can even learn how to make homemade slime with Stanford's Chaudhuri Lab!

WHEN: Thursday, Oct. 27, 6pm

WHERE: 55 Music Concourse Dr. (Golden Gate Park), calacademy.org

Free Pumpkins at Treasure Island Flea Market

WHAT: This huge once-a-month flea market is featuring a pumpkin patch with 1,000 free pumpkins this month. They'll also have themed cocktails, food trucks, and of course, 400+ curated vendor booths for vintage-lovers and art enthusiasts alike.

WHEN: Saturday, Oct. 29 and Sunday, Oct. 30, 10am–4pm

WHERE: 1 Avenue of the Palms (Treasure Island), treasureislandflea.com

Make Clowns Great Again at Civic Center Plaza

WHAT: We've all heard about those young pranksters dressing up as clowns and tormenting people—but now the clown community is fighting back. Join the Bay Area's friendly clowns for a red-nosed rally to combat anti-clown hysteria and enjoy an afternoon of professional clown acts, balloon animals, face-painting, and other classic activities. #ItsPieBackTime

WHEN: Sunday, Oct. 30, 6–8pm

WHERE: 1150 Market St. (Civic Center), emergencycircus.com

2016 Pet Pride Day on Rescue Row

WHAT: Pet Pride Day is back for its 23rd year with a block party for your furry companions and the whole family. The day will will feature pet tricks, a Pet Parade, a pet photobooth, and other activities, as well as on-site adoption and free microchipping . It's a party for the pets—but they can bring their owners, too.

WHEN: Sunday, Oct. 30, 12–5pm.

WHERE: 1200 15th St. (Mission), friendsofsfacc.org