Photo by Flickr user alsacienne.

PUZZLES: Learn to solve a Rubik’s Cube without breaking apart the pieces or removing the stickers. Bring your own Rubik’s Cube. Joan of Arc statue at Malcolm X/Meridian Hill Park (2500 16th Street NW) Free, but register here.

WAR: In “Improv Wars,” two improv teams will compete to … compete again next week! So far team “The Lodge” has won the first two weekly wars that began on 8/25. Find out if they can survive “Tempus Fugit” during tonight’s competition. Mead Theater Lab at Flashpoint (916 G Street NW) 7:30 p.m. $10.

SHOWTUNES: It’s time for another edition of “Showtunes & Cocktails,” where you sing along to showtunes with the area’s best on-stage talent. The evening will feature happy hour specials and ticket giveaways. Beacon Bar & Grill (1615 Rhode Island Avenue NW) 7-10 p.m. Free

Later this week…

TUESDAY: The 2014/2015 season at Arena Stage is kicking off with The Shoplifters. Arena Stage (1101 Sixth Street SW) 7:30 p.m. $45-80

WEDNESDAY: Sing along with your favorite red-headed orphan during the DC Public Library’s “Sing-a-long Movie Series” screening of Annie. Most spirited performance wins a prize. Martin Luther King Jr. Memorial Library Room A-5 (901 G Street NW) 6:30 p.m. Free

THURSDAY: Jeffrey Kluger, author of The Narcissist Next Door: Understanding the Monster in Your Family, in Your Office, in Your Bed—in Your World will discuss how narcissism affects us, and what you should do when you encounter it. Read our preview here. Sixth & I Historic Synagogue (600 I Street NW) 7 p.m. $12-28