We've always called it the "Snack Bar" but in the official Lego lingo you'll find it is called a "Hamburger Stand". A relatively old set-- Click HERE for instructions-- our Snack Bar has been a fixture of town since my very early years with Lego. It is actually one of the oldest sets that we have and we've had it since it was new, over 30 years ago!
I'm sure Lego designed the set with visions of it being a roadside stand of sorts, but it really fits better on the boardwalk in our town. The walk-up counter is like many eateries you'll find, literally, catering to tourists. There wasn't much sense in expanding the building itself given the boardwalk location. We have more formal restaurants in town already and the hotel at the end of the boardwalk has a full service Cafe already.
We did want to expand the size/influence of the Snack Bar somewhat, so that it wasn't just "plopped" on the edge of the street facing the wrong way. The Snack Bar sits on the same elevated platform that the boardwalk does, further separating it from the streetside and is, obviously, turned toward the boardwalk. All customers have to walk in from the boardwalk itself (though there is parking next to it on the street level).
Fences provide some safety and separation from the various skateboarders and pedestrians. While there are no sit-down tables, you can at least stand and enjoy your food without being hit or jostled by people passing by.
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