Personally, if I'm in a coffee shop or any store with some people, I pull out my wallet and subtly show them my Xapo debit card. Then they get curious on what kind of card is that since it doesnt look like the usual Mastercard or creditcard. Then I explain it from there on.
What's your way of spreading Bitcoin knowledge?

My younger brother is working on a cool blockchain project and it'll be ready for launch by the end of 2018. I'll help with the marketing and I'll be one of the first participants in his ICO.