Depending on how the drain is configured, the water may drain out well or may flow all over the floor. Ask for extra towels or extra bathmats. They don't dry as easily, but will contain the water better.
On our trip last October, we finally figured out how to keep the water from splashing all over. The shower curtains at OKW have an inner short curtain of vinyl and a long outer curtain of nylon. This will only work if the shower curtain is long and is made of nylon, but I'll share it anyway.
We were at OKW we noticed the shower curtain was kind of gathered up in a rosette, like this.....
Obviously, we couldn't use it like that, but when we took the rosette out, the shower curtain dragged on the floor by a good 6-10 inches. The first time I took a shower, I arranged the curtain so that the bottom edge was on the floor toward the inside of the shower. It got all wet and I figured the floor outside would be wet too, but it wasn't. THe shower curtain had contained the water and by having the bottom of the curtain toward the inside, water came back inside instead of going out. We had 2 bath mats in front of the shower, but they didn't actually get wet.
After we all showered, we were left with a wet shower curtain, but there was a wheelchair height retractable clothesline in the shower. We stretched it across and draped the wet shower curtain on it like this picture showed. Because it was nylon, it dried in a few hours.
PS - both pictures show a pull down shower seat. It's different in each picture because the pictures were from 2 different stays. The white seat in the 2nd picture was in an older room. The other seat was in a newer building and was a nicer seat.