I'm in a blockchain club (closest to a bitcoin club that I could find in my town), talked to sellers at the farmers market, posed on social media, told my friends. I make sure I always check the "accepts cryptocurrency" when selling things on Craigslist. Talked to people at my Makerspace

I'm the first to admit that I don't excel at these "social" things. I tend to mention it once to a person and if they don't seem interested, I'm unlikely to bring it up again with them. I don't want to be anoying.