Restaurant discovery app Spotluck will be donating $5 to the Arlington Food Assistance Center for every download and signup made with the promo code “AFAC” through tomorrow.

Spotluck is running the promotion in honor of AFAC’s Chiefs vs. Chefs fundraising event Wednesday night, which pits local chefs against Arlington County firefighters to see who can create the most mouth-watering dishes using only ingredients that would be found in AFAC’s pantry.

The “three-course throw-down” kicks off at 6:30 p.m. at Clarendon Ballroom (3185 Wilson Blvd). Tickets, which start at $100, are still available online. ARLnow.com’s Scott Brodbeck is a judge for the event, along with the Washington Post’s Becky Krystal and former Top Chef competitor George Pagonis, who’s executive chef at Kapnos Taverna.

Spotluck, which is a D.C. area-based startup and an ARLnow.com advertiser, says it’s proud to be “supporting a great cause with our good friends at AFAC.” In order to ensure the donation is made, users need to download the app, launch it and enter “AFAC” as the promo code on the signup screen.

Spotluck has 23 Arlington restaurants in the app and says it collectively sends those restaurants thousands of diners per month. In addition to helping users to find new restaurants, Spotluck also offers “preferred pricing” to restaurants that the user lands on via a virtual spin of a wheel in the app.

“Spotluck is a mobile app that allows you to discover local restaurants and save money in a fun new way,” says the company’s website. “With a simple spin, Spotluckers earn preferred pricing and forgo the hassle of figuring out where to eat next!”

AFAC serves some 86,000 pounds of food to more than 2,000 Arlington families in need each week.