Fox in a Box Madrid caters to both English and Spanish-speaking customers, though (obviously) their first language is Spanish. Still, we were able to understand our host as he welcomed us and went through the the standard rules. The explanation was a bit long-winded (our eyes started to glaze over) but it was clear the host loved his job, and his enthusiasm was infectious.
The lobby is modern, with puzzles everywhere - even on the walls. We had quite a good time trying to work out some of them before the game started!
There are the usual lockers for your bags, a wall for photos, and tables and chairs.