I haven't been to a White Castle before 11pm but today that may change!
Today is National Slider Day, and White Castle is handing them out, no purchase necessary. You only get one though. They're usually around a buck each. They posted a coupon online. You're supposed to show it to get one. But word is some locations are just handing them out if you mention the deal. Also a fun fact, only 14 states have White Castles and they are mostly in the midwest.
White Castle was actually America's first fast-food burger chain. They invented sliders in 1921. Back then, each one cost a nickel.