I love the idea of this, but the only reason I check Instagram is to see what my friends are posting, which I couldn’t do on an alternative, sadly.
As much as I love using credit cards, I like to use cash sometimes if it’s a small business, because I know the CC companies tend to gouge them with fees. (At least, I assume they do, since it’s that way in my home country.)
Japan! It’s a stairway leading to the Toei Ōedo line, among the deepest subways into the world.