I understand how you feel.
My office when I went back was all glass. All offices were glass. All doors were glass (and not sealed). The kitchen and conference rooms were glass. The outside walls were glass. Basically everything but the bathroom and storage closet were glass. Even the file room was half glass (waist up). I got to pump in the shower room. yep, a tiny room with a shower and a little space for a tiny table and chair. It was either that, or the bathroom. It was a pain to walk back and forth, carrying my stuff, turn on the light (which had a vent fan) get half undress, pump (very noisy in there, uncomfortable chair, not relaxing) clean up, carry my pump and milk and pump parts back across the office to the kitchen....
Then I moved downstairs and I get a cubicle inside an office, and the other side is unoccupied. It's awesome. I have a door, and office....it's beautiful. Unfortunately I get an office mate soon and idk how they feel about my pumping. Since they provide me with a clean, separate place to pump, if my office mate is not cool with it I will have to go back to the shower room....BUT I think I will ask if I can do it in the network room. There is a tiny room (but bigger than the shower room) off the kitchen, not as clean, but it has a door and room for a chair and table and I can keep my table clean. I would have to share it with a bunch of wires and stuff, but no biggie. And it's right next to the kitchen and fridge! One can hope.
I was the only one pregnant in my office in the past 14 years, and definitely the only one pumping! It was odd. I didn't try and hide, but didn't advertise either. Then we hired some new people who both had to pump for their kids in the past, and they understood. It's nice. I pump my milk and pump parts in the fridge, and only one person has even hinted they aren't thrilled (they just said "you really need a mini fridge, don't you? then you won't have to put your milk in here", I just shrugged and said "I don't mind keeping it in here....")