They're NOT segregated by being confined to the Old Executive Office Building next door, because both are connected by breezeway and by tunnel.
And the Administration works in the OEOB
I agree with that, it's in the "White House Complex," so I imagine it's as easy/difficult to get to as is the White House itself. This strikes me as more of a status thing for the press, and they're looking for a way, any way, to stick it to Trump. They've pretty much failed at everything else they've tried.
I like the way his crew is playing it: "OK, you can stay in the room, but
you'll have to find a way to accommodate more people, or
you're going to have to throw some people out.
You decide."