There's a copy of that Dilbert strip that takes the piss out of advertising.
There's a humorous Pantone 'tea' swatch chart sellotaped to one of the cupboards in the communal kitchen, while on a nearby cupboard there'll probably be..
..An A4 sheet instructing people to please keep the kitchen tidy, on which will be grafittid typographic markups (bring up to line above, close up etc..) some wag might even have inscribed 'stet' next to one of these.
You're in Soho.
That's about it.