Okay, quick question. If you were going to take a shower, and the curtain to one of the showers was closed, would you rip it open?
Apparently, for some, the answer is yes. I am getting ready to take a shower, when suddenly my curtain is flying open. Yeah, a little AWKWARD. The thing I don't understand is the fact that there were three, count them THREE, showers with the curtains open. Why would you go to the one that was shut?! Seriously people!
My advice: If there is a shower that has a closed curtain but seems unoccupied, you might try asking if someone is in there. You may be just talking to a curtain, but that seems a little less awkward than walking in on someone taking a shower. But it's your choice.