I've been back to work for about 6 weeks -- it's a small company and very few people have kids. I'm the first person in our office to ever pump at work and wasn't sure how they'd deal with it, but they gave me an empty office and have been supportive.
Just now, the director let me know that they're ordering a couch and table to set up an official "pumping room" so that I'll be more comfortable. She said that's how it should be and this way the next person will have some place to use too.
I felt so weird talking to them about it at first, but I'm glad I did.
Re: New pumping room :)
That's what I thought I'd be doing too, but there were layoffs while I was on maternity leave and a couple of offices became empty. Things worked out -- don't be afraid to ask, they may be able to work something out for you.
I would ask if I were you! In NYS, employers are legally required to provide a clean, appropriate, private space for pumping and it cannot be a bathroom.