The Shake Shack Track & Field club has spirit — and a good excuse to eat custard. (Courtesy Elyse Braner) The Shake Shack Track & Field club has spirit — and a good excuse to eat custard. (Courtesy Elyse Braner)

You’re already wearing an elastic waistband when you run, so you might as well take advantage of it.

Shack Track & Field

Starts at 7 p.m. the second Tuesday of every month (including tonight) at Pacers (1427 P St. NW).

What do you get when a running store teams up with a burger joint? An awesome night, promises run club leader Elyse Braner. Everyone gathers at Pacers in Logan Circle before setting off on either a 3- or 5-mile route. Both groups — and any stuff people leave behind at Pacers — end up at Shake Shack (1216 18th St. NW), which reserves its upper level for the ever-increasing crowd. (Numbers have gone up each month since the event debuted this summer; September’s run attracted 58 people.) It’s free to participate, but if you fork over $10, you get a green T-shirt and a card that entitles you to a free drink at every team meeting.

The Heights Run Club

9 a.m. Saturdays at 3115 14th St. NW;,

Keith Vient, bar manager at The Heights, keeps spirits high when he brings folks together for a weekly run followed by brunch. He selects a different route each Saturday that’s between 4 and 6 miles. It’s usually hilly — “Welcome to Columbia Heights,” jokes Steve Goetz, 32, who’s been with the club since it started in February — but anyone who survives the ups gets to down their meal for 25 percent off. “If you can combine running and eating, it’s a win,” adds Jessica Franta, 31.

D.C. Half and Half

Nov. 2;

All 150 slots have been snagged for D.C.’s annual Half and Half Marathon. The race, which debuted in 2012, requires participants to take a break 6.55 miles into the run for a pit stop at Ben’s Chili Bowl. At the restaurant, they need to down a half smoke smothered in chili, mustard and onions (or eat a veggie option) before they can get back on the road and run another 6.55 miles to the finish line. Race organizers are still looking for volunteers.