Is that part of the Tyn y Coed Hotel? There's also the Bryn Tyrch, which used to be great but it had become a bit gastro pub last time I was up there and it wasn't an improvement. Cobdens is the it other, which is the worst of the three.
Stables is in Betws Y Coed. Big hotel pub, does all sorts. Like a big Spoons/Sizzler. Big plate stuff. Did eat there last time, also went to watch a match there.
Stables is ok then. Haven't eaten anywhere in Betws bar there and the Ty Gwyn, which is a bit posh. Oh, and the chippy. The shops are great, you can kit yourself our for an expedition in Betws.