SAN DIEGO UNION TRIBUNE – This already super-sized resort is just days away from earning the distinction of being California’s largest casino hotel. With its new hotel tower set for a soft opening on Dec. 22, Pechanga will boast a total of 1,090 rooms. A luxury two-story spa, an event center and the Lobby Bar bistro will also debut the same day, while the expanded pool complex will open in the spring.