While checking out more Sound! Euphonium places I also went back and took some pictures inside the eating places in Sound! Euphonium I had visited earlier.
Image from S1E7 - 21m14s
Inside the Saizeriya restaurant near Uji-bashi Bridge. I've marked the location of this place in the map below.
Image from S1E10 - 05m58s
This is inside the McDonald's near Kohata Station.
Image from S1E10 - 06m05s
The decorations on the wall behind Natsuki is different.
Image from S1E10 - 06m45s
This place is also shown in other episodes of both seasons, but they show other tables where there were people sitting when I was here.
These locations were visited on 2016/10/21.