I use to to help with the nursery at a very small church. The Nursery was downstairs next to the the two small restrooms for males/females. Whenever I had to go out to a restroom to get towels or water for the nursery I would often find a small line of individuals waiting to use the restrooms.
Recognizing this as a problem I spoke to our pastor and mentioned a simple change. Once implemented the length of the lines I would see started to decrease until there was usually not a line left.
What simple change allowed us to decrease the wait for these individuals?