It’s called “The Power of Two,” but more than one duo is behind tonight’s power-duet cabaret at Arena Stage. For starters, there’s the pair of singers who are reuniting for what should be a beautiful evening, Nicholas Rodriguez and Eleasha Gamble. They’re back to sing a show arranged by two theaters, under the direction of two guys known for putting on blockbuster musicals at Signature Theatre: Matthew Gardiner and Gabriel Mangiante. The setlist features heavy tunes recorded by famous twosomes, including The Indigo Girls’ “Power of Two,” Marvin Gaye and Tammi Terrell’s “Ain’t No Mountain High Enough,” and “Anything You Can Do” from Annie Get Your Gun. Read more >>> The show runs Dec. 11 to Dec. 15 at Arena Stage, 1101 6th St. SW. $25–$40. (202) 554-9066. arenastage.org. (Rebecca J. Ritzel)

EAT THIS

Taylor Gourmet has joined the likes of Sweetgreen and Cava Mezze Grill with the launch of its own payment and rewards app. Download it on your iPhone or Android, and then use it to pay for your hoagie by scanning the app’s QR code at the register. Get $5 off your first order paid with through the app and an additional $5 for every $55 you spend. Taylor Gourmet, multiple locations, taylorgourmet.com. (Jessica Sidman)

OH AND ALSO

Tropicalia hosts a local rock show featuring Heavy Breathing, The Jet Age, and Tereu Tereu. Screen Vinyl Image and Paul of Hometown Sounds will spin DJ sets. Find more information on Facebook. 7 p.m. at 2001 14th St. NW. $10.

North Carolina-based multisensory folk act Lowland Hum plays Sixth & I Historic Synagogue with The Cowards Choir. 8 p.m. at 600 I St. NW. $10.

Familiar with the Iranian neyanban? If not, it’s a Persian bagpipe, and Iranian performer Saeid Shanbehzadeh will be playing the artfully cacophonous instrument tonight at the Freer Gallery as part of “Sound: the Encounter,” a Persian-meets-Syrian-meets-jazz music program. 7:30 p.m. at 1000 Jefferson Drive SW. Free.

The Library of Congress celebrates Mexican culture with its two-day event, “Celebration of Mexico,” featuring film, dance, speakers, and music. 9 a.m. to 5 p.m. at 10 First St. SE. Free, registration required.

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