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Superfans of J.K. Rowling already know they’ll be summoning themselves to the Black Cat tonight: The club certainly sounds like a Potterverse venue,  and the staff do their part to set the mood. The Cat has also gone and booked Harry & the Potters, the best magical family act since the Weird Sisters. Muggles take note: Every song is devoted to some corner of Rowling’s universe, but the band also pays tribute to a Weezer/Rentals era of jangly guitar, sing-song choruses, and analog synthesizers. A decade later, I’m still humming the chorus about saving Ginny Weasley from the basilisk. Read more >>> Harry and the Potters perform at 6:30 p.m. at the Black Cat Backstage, 1811 14th St. NW. $12. (202) 667-4490. blackcatdc.com. (Kriston Capps)


Grab a Sweetgreen salad today, but break out your phone, instead of your wallet, and try out the restaurant’s new payment and rewards app (available for iPhone and Android). Once you’ve put in all your information, all you have to do is scan a QR code at the register. There are perks, too: For every $100 you spend, you get a $10 credit. You also unlock various “statuses,” which get you better rewards. In addition, one percent of all purchases made through the app go to D.C. Farm and School Network. Read more more about the app here. (Jessica Sidman)


In the mood for some vocal acrobatics? Pentatonix, the a cappella group that beat Howard University’s Afro Blue on the third season of NBC’s The Sing-Off, performs tonight at the Fillmore. 8 p.m. at the Fillmore, 8656 Colesville Road, Silver Spring. $35.50.

Learn how to travel the world without going broke from Matt Kepnes, a.k.a. Nomadic Matt, a blogger who quit his day job in 2004 and has been exploring the globe ever since. 7 p.m. at Comet Ping Pong, 5037 Connecticut Ave. NW. Free.

Tim Noyes, frontman of New England based folk-rock band Aunt Martha, plays a solo show tonight at DC9. Fellow folkies Luke Mitchum and Von Wilson open. 8:30 p.m. at DC9, 1940 9th St. NW. $8.

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