NOTICE restrooms are for customers only

Here is a professional way of limiting the use of facilities to customers only.

I can customize it to suit your needs It is high-quality vinyl on an aluminum background. 
 
Can also be ordered to read Beware of Rooster Beware of geese Beware of Donkey Beware of Goat Beware of wife Beware of Children Beware of dog poo Beware of cat poo Beware of Doggie bombs etc use your imagination