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).
I find wearing tshirt with btc cool though i never tried it. I'm thinking of buying one and wear It in school sometimes. I'm sure they will ask me what btc is given the fact that person nowadays were too outfit conscious. Why not take advantage on it to arouse their curiousity of what btc is. I'll try it. Haha.