Some image comparisons:

**NOTE: It is likely that Ayu might've taken a photo from the back side of the restaurant which probably has the logo in a different place.
I'm not 100% sure that she ate at that Korean restaurant, but it's REALLY close to where she was. (Only thing is that they don't have yellow tables! Waaah!)
And this isn't exactly a photo from the restaurant since no one seems to have taken any photos of the soon doo boo at that place... but it looks basically the same.