We all love a quick $1.50 hot dog combo, but one cannot live on frankfurters and soda alone. That’s why Costco’s food court sells a handful of other delicious things, from Chicken Bakes to sundaes.

Becoming a member at Costco grants you access to the store and its many amenities, like the beloved warehouse food court, but it takes insider knowledge to truly learn all of the chain's secrets. Like ...