2/210. If you run a "take a number" style business, just happen to "close early" right before their numbers would come up. Have a "mandatory conference meeting" or a "birthday party" or some other innocuous thing that just has to be done "right now." Have it go on until well after the normal closing time.11. If you're a cab/Uber/Lyft driver, you could choose to require a profile photo of all your passengers. Anyone not willing to show their face doesn't get a ride from you.