Yes.
The "elevator pitch" isn't specifically a career fair skill, but a networking skill.
Be able to introduce yourself, tell a person who you are, what you're after and make it actionable. SOOOOOO many people run into someone that could help them and literally treat it like Pokémon.
"HI I'm Frank, can I have a business card?" And then 12 hours later you get a random email from a person you don't remember with a LOR request from airline apps
Doug, I try to send a short email to the recruiter after a face to face at conferences, never asking for a LOR, just a simple thank you. Your statement above has me wondering if this is a bad idea in the future?