Yes - make sure you have it shut again within 3 seconds to avoid alerting security. So if there's a group of you going through, rush one person at a time. C'est easy!
REALLY? Wow. Are you sure? I swear they have glass you have to break before they'll open...
As for bathrooms, the apartments are great. I like my en-suite porta-bathroom, as I call it. It's got all I need and I don't have to share it.