I was just there yesterday! I searched on this forum and did not find very precise information for post-Spanair-closure.

The good news is there is a very nice lounge just upstairs from D60, something like "Lounge Alcalá." It has pretty good sandwiches and snacks, drinks, coffee, good service, and they did not even bat an eye when I showed them my UA card for my economy class ticket.

No free Wifi, though. I did not notice whether there was a shower.