There is a cyberpunk themed festival that's been going on for a few years called Neotropolis out in the Mojave Desert in April. Unlike other themed festivals like Burning Man or the Renaissance Festival, this festival is heavily focused on LARPing (in fact, you must wear a costume of some kind at all times in public areas) with factions, missions, and other narrative artifacts (setting, NPCs, etc). There's also entertainment, food, vendors, and people who just want to have a good time.
This year's festival is April 23rd-27th 2025. I'm not just considering going, but being a volunteer.