Konocti casino in Lakeport, but only in the front. Slots only.
The only one I know of is in Burney, CA. If you don't know where that is, it's about 80 miles northeast of Redding ( take 299 E). Just make sure there are no snow storms and you're good to go.
I didn't think there are any casinos allowing anyone under 21 is allowed inside.
None that I know of in cal.
Thanks! Your answer is awaiting moderation.