Boy have I got news for you… there is indeed an LA yoyo club and it’s actually the biggest yoyo club in the US. It’s called DXL and it’s been around since the early 2000’s, so it’s actually most likely the longest running as well in addition to being the biggest.
We meet up once a month in Artesia (it’s a good mid point for people in LA, OC, and Riverside county), and there’s several ways you can find out when the next one is going to be:
https://www.instagram.com/dxlcrew/
And here’s a thread on YYE for it, although it’s not an official thread or anything and definitely isn’t updated as much as the above official FB and Insta links.
Would love to have you come out!