Yeah there are usually 4 or 5 women at work using the room. Sometimes there'd be 2 or 3 of us in there at the same time. We had our own locked room - The Lactation Room. It has 4 private cubes within the room and each has drawers, books, magazines, outlets for laptops, etc. Then there's a fridge for everyone to put their milk in. One of the biggest inspirations for me was a lady who was pumping for the milk bank as her toddler had weaned but she kept pumping for the milk bank. I met her when I first came back to work and thought oh wow that's awesome. When the nurse finds out you are pg, it is assumed that you will need a key to the room because you will be breastfeeding/pumping. My company has won awards for a pro-nursing workplace (from LLL I think actually). They even had 2 hospital grade pumps there too so you could just bring your own hook ups (the Medela Lactinas). Although I got more suction out of my PIS so after a few months I started just bringing my own pump with me.
It is definitely a big company ... I work for a Fortune 100 corporation here in Austin ... I'm a senior business analyst. It is definitely an incredible place to work for a breastfeeding mom. My boss was very understanding and knew why it was hard for me to do lunch meetings or travel and I haven't traveled yet since I returned to work although there have been times where I almost had/should have for one reason or another. Having a room with a fridge is really pretty basic (the pumps went above & beyond) but its a shame so many companies don't even have a room for moms.