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 way of spreading my knowledge to Bitcoin is by telling them what i had been experienced here in forum on how I get joined from the campaign, translating a white paper, what is crypto market, the volatility of bitcoin and more. By the way I told it to my friends and also to my parents, some of them don't believe on me but a ton of them helps them a lot even my sister and my brothers. I just share what I know and then it change their whole life which makes me happy.