How do you only rent 'mens' toilets? Port-a-potties usually aren't labeled, unless they are just urinals. Did the conference centers lock out the 'women' toi

How do you only rent 'mens' toilets? Port-a-potties usually aren't labeled, unless they are just urinals. Did the conference centers lock out the 'women' toilets? Most conference centers that I have been to don't have access doors to the restrooms, it is a u shaped freeflow walk in. This removes the bottleneck and cuts the cost of a door.