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.
If you'd be doing this here you will quickly lose a lot of friends.
Around here only gypsies are opening their wallets wide so anyone can see how many cards or notes they have in.
You're better of wearing bitcoin t-shirt.
There are some really cool ones for sale. (with btc of course).
A good way to show how much I love bitcoin, wear a bitcoin t-shirt imo. There won't be any people intrigued and ask about bitcoin if we never mentioned about bitcoin. Usually, I just write some stuff related to bitcoin, money (btc value) and blockchain to attract friends ask about it, well it works sometime. But, the best way is explain directly to my friend, currently ; all of my close friend know about bitcoin or at least ever heard I mentioned it.