MAGWest 2025 describes itself as:

MAGWest is a music and gaming festival featuring a 24-hour gaming hall, at least three stages of planned concerts, video game community guests/VIPs, and community-run panels. The festival runs from Friday, August 8 to Sunday, August 10.

This was sourced from https://magwest2025.sched.com/ which was linked from the official MAGWest website.

On this page, we can see more information about MAGWest's history:

MAGWest spawned from MAGFest, the Music and Gaming Festival currently on the East Coast. MAGWest is a three day event dedicated to the appreciation of video game music, gaming of all types, and the gaming community. MAGWest is the West's flavor of video game music, gaming, and non-stop party action! The event runs 24 hours a day, and offers consoles, arcades, tabletop, LAN, live video game cover bands, chiptunes, guest speakers, pool concerts, and so much more!

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What makes MAGFest, and consequently MAGWest, unique, is that it’s a non-profit event run by fans for fans.

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MAGFest started in 2002, and as the event started growing uncontrollably, expansion was the only way forward. After years of planning and preparation, MAGWest had its first event in 2017, with passionate volunteers fostering an unrivaled sense of community and appreciation for all things music and games.

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MAGWest is run by MAGFest, Inc., a non-profit organization dedicated to furthering the appreciation of games and video game music.

MAGFest Inc.’s main method of achieving this goal is to create events which provide a means for people to enjoy games and musical concerts.

I remember that when I attended this year that it was at the DoubleTree by Hilton San Jose, 2050 Gateway Place, San Jose CA 95110, US.