Restroom just outside Regal Theater in Kapolei Commons. The end stall is big and the stall next to it is perfect for under-stall action. The entry door gives you lots of time to adjust if someone comes in.
As soon as you walk in, there is a general changing area. If you turn left after, you go into the bathroom area which has roomy urinals and stalls. If you turn right - you are headed to the sauna area. There is a steam room and sauna on the left and a mini locker area and 2 private shower stalls on the right. The private shower stalls has a door which you walk into a mini changing area then the shower stall itself. Very roomy for playing.