Inkopolis News Studio
The name(s) presented could be conjectural.
The Inkopolis News Studio is where the Squid Sisters film Inkopolis News. It is located in Inkopolis Plaza, next to the Battle Dojo, and on top of Inkopolis Café. It cannot be entered, although Inklings on the Plaza can go up to the walkway to the Battle Dojo, and keep going to reach a balcony where they have access to the studio's big window. From here, they can see the Squid Sisters. Splatoon 2's studio can be found next to The Shoal, with Off The Hook in it.
Easter Egg
There is an easter egg here: if the player looks through the studio's big glass window, the Squid Sisters or Off The Hook will eventually turn to the player and wave.
Appearance
Splatoon
In Splatoon, the Squid Sisters sit on chairs. The table in front of them has two lollipops on it, inside a container.
Splatoon 2
In Splatoon 2, Off The Hook also sit on chairs, Pearl on a beanbag chair, and on the table what appears to be a bag of chips.
Usage
Here, Inkopolis News is filmed. In Splatoon, people also order food and drinks, as there is a food joint beneath it. In Splatoon 2, there is a second floor, possibly used to film movies or music vidios.