[There was a reason why that area is considered a cerevice-free spot.]

According to the people running it, the area is covered in magics to prevent the ocular implants from broadcasting. Also in order to go in, you have to leave the CereVice in basket outside of it.

[He didn't question it; as far as Jinga was concerned, it was a nice place to sit and enjoy mingling with people without Ryuuga breathing down his neck.]

I'm sure there's a reason why CERES doesn't bother with it; I just never asked.