Pocket-protector crowd

Posted by Hajime Miyahara on June 12, 2005

I found the following sentence in a recent news article in The Washington Post:
"For Yamagata, it was just another night out with the pocket-protector crowd in Tokyo's neon-splashed Akasaka district....."
I would like to know what "pocket-protector crowd" means.
Thank you in advance.

• Pocket-protector crowd Bob 12/June/05
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    • Pocket-protector crowd R. Berg 13/June/05