The Oak Park Public Library honors National Gaming Day by putting on its own “Hi-Lo Tech Night” Saturday from 7 to 11 PM. Patrons in their 20s and 30s are invited to come to this after-hours nerdfest to play video games and board games, exchange mix CDs and mixtapes, and gorge on Capri Sun and other snacks that’ll remind you of a third-grade sleepover. The event, organized by the Genre X book club, will also feature several DJs.