The bar of the Tooting & Mitcham United football club looks like a relic from the 1930s. Black-and-white photographs of past players line the walls as fans queue to buy £5 ($6.80) pre-match pints—a bargain by south London’s standards. But instead of accompanying their beers with pies like fans of yore, today’s supporters are tucking into perfectly seasoned jerk chicken and plantains served on rice. “The food is what gets me here,” says Terry, a Chelsea supporter turned season-ticket holder at semi-professional Tooting. Lower-tier football clubs are having a culinary moment. Footy Scran, an Instagram account documenting football-stadium food around the world, has singled out several clubs outside the Premier League for praise. Supporters of Whitehawk, a non-league club in Brighton, can tackle a gravity-defying burger combining chicken, beef and hash browns, topped with onion fries. Forest Green Rovers, in the Cotswolds [Forest of Dean?], another non-league club, has decid...