For those in the Northeast area, there's a little stand at California Car Wash (Los Feliz & Central) that serves chargrilled corn on the cob as well jumbo 1/4" lb Hebrew National dogs. Checked it out today.
The dog is $3.00 (plus .30 tax). While not the bargain from Costco down the street, and certainly not natural casing, it was still very tasty, the bun was perfectly toasted, and the owner amiable in an old world sort of way. I didn't have anything to drink, and condiments (of which I don't usually partake) seemed minimal, but YMMV.
Worth the extra buck or so over the Costco bargain for those who prefer a grilled or chargrilled dog. Not sure about details like hours, but when I was previously there on a cloudy day, the car wash was open but the stand appeared closed.