Five things to do in Brooklyn this week!

Friday

July 21

Union rules

Beloved Park Slope bar, venue, and bocce spot Union Hall has been closed since a fire burned up its attic in March, but the repaired, revamped, and redecorated space re-opens this afternoon! The opening party will feature $3 pints of Sixpoint beer, music from DJ Taela Naomi. special giveaways, and free karaoke kicking off at midnight.

1 pm–2 am at Union Hall [702 Union St. between Fifth and Sixth avenues in Park Slope, (718) 638–4400, unionhallny.com]. Free.

Saturday

July 23

Water ball

Party like Poseidon at the Grand Neptune Ball! This fund-raiser on board the Waterfront Museum Barge will feature big band music from Steve Oates and the Zac Greenberg Quartet, cocktails from local distillers Van Brunt Stillhouse and Widow Jane, hors d’oeuvres, and people dressed in their maritime best.

8 pm at the Waterfront Museum Barge [290 Conover St. near Reed Street in Red Hook, (718) 624–4719], www.waterfrontmuseum.org. $50.

Monday

July 24

Tasty Cenac

Fort Greene comedian Wyatt Cenac’s show “Night Train” has been running each Monday since 2012, and there’s a reason for its longevity — it’s excellent! Tonight’s show welcomes Saturday Night Live’s Melissa Villasenor, along with a mixed group of established and up-and-coming stand-up from around the world.

8 pm at Littlefield (635 Sackett St. between Third and Fourth avenues in Gowanus, www.littlefieldnyc.com). $8 ($5 in advance).

Tuesday

July 25

Toon in

Before Disney hit it big with his cartoon mouse, Brooklyn was the center of the animation world! Learn about the borough’s historic moving drawing industry at tonight’s panel “The Amazing and Incredible History and Future of Brooklyn Animation,” and see some clips of home-grown cartoons like “Betty Boop” and “Gertie the Dinosaur.”

6:30 pm at Brooklyn Historical Society [128 Pierrepont St. at Clinton Street in Brooklyn Heights, (718) 222–4111], www.brooklynhistory.org. $5.

Thursday

July 27

Toon out

You’ve learned about the past and future of animation in Brooklyn — now catch the present! You can see cartoons under the stars at this Rooftop Films screening of 13 short animated films featuring unicorns, octopi, and a wizard with a robot best friend (“Sloof’s Supershop,” pictured). The cartoons will be followed by a discussion with the filmmakers and an after-party.

8 pm at Courtyard 5-6 of Industry City [Second Avenue between 34th and 35th streets in Sunset Park, (718) 417–7362], www.rooftopfilms.com. $15.