score:3
Yes domestic tren hotel services are still running.
http://www.renfe.com/EN/viajeros/larga_distancia/productos/trenhotel.html
Also renfe have recent started investing in new carriages for these services,
http://www.renfe.com/EN/viajeros/nuestros_trenes/trenhotel.html
Just to make sure my info was correct I did a time table search on one of the routes and came up with this