Are hotdog machines real?

In the UK, if you buy a hotdog outside it's usually from a stall parked up somewhere. They'll either be cooked on a hot grill or will be plucked out of hot water as seen in the pics, if you're really lucky, you'll get one that was dropped in today.

I've never seen a hotdog machine in the UK. My only knowledge of them comes from Apu's kwick e Mart in the Simpsons.

So are these things real or just something you see on TV and if so how common are they?
Are hotdog machines real?
Are hotdog machines real?
Are hotdog machines real?
Are hotdog machines real?
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