It turns out that this was a bit of an oversight of mine - as called out
by Chris Emerson on Twitter, I hadn't named Ludorati cafe as our
destination.

Then, looking through the Microformats wiki, it appears that to embed
the details of a place (i.e. add a `p-name`) you need an `h-card`.

If we're doing that, we should be re-using the params from `.adr` and
`.geo`, instead of duplicating them into our `card` namespace.