I’m in Seattle, and while pubs/bars are 21+, it’s up to breweries whether they want to allow kids.
One of my favorite local breweries recently decided to switch to all ages, and it was really disappointing. Doesn’t seem crazy to hope for a kid-free experience at a place that exists to serve beer.
I prefer to support breweries directly, but I’m not going to pay to go somewhere I need to deal with other people’s kids.