Inkopolis Café
From Inkipedia, the Splatoon wiki
Splat Cafe is located underneath the Inkopolis News studio in Inkopolis Plaza. It is on the left of the entrance to Spyke's alley. The cafe is just for the looks: you cannot enter it without the use of the out-of-bounds glitch.
Appearance
The cafe has a big, curved glass window. Its shape matches the Inkopolis News studio above it. Inside, there is a counter where Inklings can buy food and drinks. There is amend on it. There are no lights in the cafe, and there is no one inside it.