There are several restrooms and 3 men to test the men that come in and there are 4 woman that test the woman that come in and they don't test everyone that comes through the door. Is a Random thing where you put your number in and the computer just randomly picks people to test.and its fast.
Sometimes it takes longer than others, but usually there are less than 3 men waiting to drop. A lot of the time there is no one waiting ahead of me when I get dropped. The computer is completely random, though. Some weeks you may drop 3 times, and other weeks you may not drop. It is possible to drop every day in a week, although I don't know anyone who has done that. My advice is always be ready!!
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