For 4 months now.
Let that sink in.
What happened is that I transferred from a 'public' team to a 'private' team, which means that I might have access to privelaged insider information,which means I can't sit with the public teams. But there isn't any seat in the private rooms. So I'm sitting in the cafeteria, reading books, playing on the PlayStation, etc etc.
I ask my manager every single day when I'm going to get a new spot. It's usually 'next week for sure' or 'friday for sure'. Hasn't happened yet. During the first month, I stayed for 8 hours each day, doing nothing. I've gradually stopped giving a fuck anymore and am looking for other jobs now, even though this is a pretty sweet gig.