Should we try that new place in the corner?
A joke about "on the corner" vs. "in the corner" --- a "new place on the corner" would be a new restaurant that just opened on the corner of a city block. but here, there's a new place "in the corner" of the current room they are sitting in: the out-of-place food truck. It's funny to think how they could have possibly not visited this food truck before, it's literally next to them in their living room.