“Cult: 10/29,” an exhibit featuring work by 18 members of the DC-based underground photography group the Cult of Frank Van Riper, opens with a reception at Social on Thursday. The evening later turns into a Halloween party, featuring face paint, cocktails, food, and a DJ. 6 to midnight. $10.

A staggering 40 percent of the world’s population lives without access to toilets. Learn about how this oft-ignored issue affects public health and the environment at Thursday’s screening of The World’s Toilet Crisis at AED Theater (1927 Florida Ave., NW). A reception follows the film. RSVP to winspartnership@gmail.com. 7 to 8:30. Free.

See if Edgar Allan Poe’s eerie abilities run in the family at the Georgetown Theatre Company’s presentation of An Evening With (the Ghost of) Eliza Poe Thursday night. An actor playing Eliza, the writer’s late mother, will read from her son’s poetry and short stories. Check out the performance at the Writer’s Center in Bethesda from 8 to 9:30. Free.

Although most baseball fans will be glued to game two of the World Series, the Anacostia Community Museum is offering a fascinating look at baseball’s history Thursday. Dwayne Sims, founder of the Negro League Legends Hall of Fame, is showing clips from the recent Ken Burns documentary The Tenth Inning. The event is running in conjunction with the exhibit “Unequaled: Black Baseball in the District of Columbia.” Call 202-633-4844 to make a reservation. 7 PM. Free.

DC Metromix kicks off Halloween weekend with a party at the Capitol Skyline Hotel Friday at 10. There’ll be drink specials and a costume contest with prizes. Tickets are $10 if purchased in advance here ($15 at the door).

If your costume features a mask, head to the Rock & Roll Hotel Friday to get in to the Masquerade Halloween Party for free. The Last Monarchs, the Cascade, the Frontiers, and Go are performing. No mask? It’s $5 at the door. 8 PM.

Can’t get enough Poe? Don’t miss “An Evening With Edgar Allan Poe” at Dumbarton House on Friday, when actors perform three 15-minute plays in and around the historic home. Gothic attire is encouraged, and there will be a cash bar as well as crepes from Napoleon Bistro. The bar opens at 6; the performances run from 7:30 to 8:30. Purchase tickets here ($10).

Whether you’re a longtime fan of The Rocky Horror Picture Show or this week’s episode of Glee inspired you to see the cult classic, E Street Cinema’s annual midnight showing of the movie worth the anticipation. It’s playing Friday and Saturday with a live shadow-cast performance by Sonic Transducers. Click here for tickets ($10).

Saturday is the annual Fright Night Monster Bash at the State Theatre in Falls Church. There are three floors of dancing, two bands, and a DJ. A $300 cash prize is awarded for the best costume. 8 PM to 2 AM. Purchase tickets ($9.25) here.

Red Bull Soundclash arrives in DC Saturday, pitting the local hip-hop emcee Wale against the indie-rock band Tokyo Police Club. Through four rounds of competition, each act will be challenged to win the audience’s approval and prove its musical mastery. The stage will be at Fourth Street and Pennsylvania Avenue, Northwest. Gates open at 5; the show begins at 7:30. Click here to purchase tickets ($10).

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