Employees flash them to get in
Else clues• Admission requirements, sometimes
• Airport check-in essentials
• Bouncer's requests
• Bouncers often check them
• Bouncers' checks
• Checked things
• Checkpoint requests
• Driver's licenses, e.g.
• Driver's licenses, often
• Entrance requirements, perhaps
• Gatekeeper's requests, perhaps
• Proofs of age, perhaps
• Requests at bar doors
• Some passes
• Students carry them
• Students' needs
• They may be worn with clips
• They may have your number
• They prove you're you
• They're checked at bars
• They're issued to students
• They're often flashed
• Universities issue them
• What bouncers check